Life is a sexually transmitted disease with an inevitably fatal outcome'

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CONTINUE READING
VOLUME 1 • NUMBER 4 • december 2009

                  OF PRIMARY HEALTH CARE

‘Life is a sexually                      Original Scientific Paper
                                         Gender differences in general practice
                                         utilisation

 transmitted disease                     See page 261

                                         Original Scientific Paper

 with an inevitably                      Reducing gender inequality in life
                                         expectancy
                                         See page 270

 fatal outcome’                          Original Scientific Paper
                                         Meeting the needs of men in general
See Back to Back, page 319               practice
                                         See page 302

                                         Original Scientific Paper
                                         Immunisation subsidies do not cover
                                         practice costs
                                         See page 286

                                         Back to Back
                                         For and against PSA testing for
                                         prostate cancer screening
                                         See page 319

                                         Ethics
                                         Exchanging values and seeing other
                                         world views
                                         See page 332
contents
                                                                                     VOLUME 1 • NUMBER 4 • December 2009

                                                                                                                  issn 1172-6164 (Print)
       OF PRIMARY HEALTH CARE                                                                                   ISSN 1172-6156 (Online)

256   Editorials                                                      319 Back to Back

From the Editor                                                       319   New Zealand should introduce population screening for
256   Improving men’s health benefits us all                                prostate cancer using PSA testing
      Felicity Goodyear-Smith                                               Yes Robin Smart; No David Tulloch
Guest Editorial
                                                                      323 Continuing Professional Development
258   Developing men’s awareness of health issues
      Lannes Johnson
                                                                      323   Charms & Harms: Saw palmetto
261 Original Scientific Papers                                              Joanne Barnes

Quantitative Research                                                 324   String of PEARLS about low back pain

261   Gender differences in general practice utilisation in           324   Cochrane Corner: NSAIDS are effective in the common cold
      New Zealand                                                           for pain and sneezing but not other symptoms
      Santosh Jatrana, Peter Crampton                                       Bruce Arroll

270   Getting back the missing men of Aotearoa: declining gender      325   Pounamu: Strategies to address disparities in access to care
      inequality in NZ life expectancy                                      must be multidimensional
      Peter Sandiford                                                       Peter Jansen

278   Human papillomavirus and papillomavirus vaccines:
                                                                      326 Essays
      knowledge, attitudes and intentions of general practitioners
      and practice nurses in Christchurch
                                                                      326   Who shall decide: telling the truth and avoiding the
      Judith Henninger                                                      law—patient consent in the millennium
286   The cost of immunising at the general practice level                  Bryan Frost
      Nikki Turner, Paul Rouse, Stacey Airey, Helen Petousis-Harris   328   Cardiovascular disease risk profile tools and New Zealand
297   Variation in Partnership Health general practice enrolment            —the best way forward?
      data related to need and hospital and national records on             Pauline Boland, Helen Moriarty
      ethnicity
      Laurence Malcolm, Ross Barnett                                  332 Ethics

Qualitative Research                                                  332   Values transparency and inter-professional communication
302   New Zealand men’s health care: are we meeting the needs of            David Seedhouse
      men in general practice?
      Eileen McKinlay, Marjan Kljakovic, Lynn McBain                  335 Letters to the Editor

311 Improving Performance                                             339 Book Review
311   Do invitations to attend Well Man Checks result in
      increased male health screening in primary health care?         339   Healthy Bastards—Dave Baldwin
      Pete Barwell                                                          Reviewer: Lannes Johnson

315   More allopurinol is needed to get gout patients
EDITORIALs
      from the editor

                           Improving men’s health
                           benefits us all

                           T
Felicity Goodyear-                his is the final issue of the first volume of    and colleagues explore the possible barriers inhib-
Smith MBChB, MGP,                 the Journal of Primary Health Care (JPHC).       iting men from using general practice.8 Sandiford
FRNZCGP, Editor                   Having started the journal with an empty         demonstrates that the disparity in life expectancy
                           kete,* we now have an abundance of original New         between men and women has been reducing,
                           Zealand research to feast on, and will soon need a      and discusses how this trend may be continued.9
                           rua kumara† to store the remainder of this year’s       Barwell describes his own practice’s initiative of
                           harvest. The response to the journal has been           proactive invitations for well men checks.10
                           overwhelming and we are truly grateful to the
                           large number of researchers from wide-ranging           The men’s health theme is continued by urolo-
                           disciplines who are choosing to submit their work       gists Smart and Tulloch going Back to Back
                           to the JPHC.                                            on prostate specific antigen (PSA) population
                                                                                   screening for prostate cancer.4 Charms and Harms
                           One of the most pleasing aspects of the journal is      deals with saw palmetto, commonly employed for
                           the academic debate it is engendering. This is not      treatment of benign prostatic hyperplasia (read to
                           only the Back to Back columns in each issue.1-4         find out whether the evidence supports its use).
                           Letters to the Editor this month continue Gilmer        Baldwin’s book Healthy Bastards, an accessible
                           and Gorman’s discussion about the roles of nurse        guide for the everyday Kiwi bloke, is reviewed
                           practitioners and general practitioners (GPs),3 the     and a guest editorial explains why encouraging
                           evidence-base for acupuncture is fiercely contested,    men’s awareness of, and attention to, health is-
                           and Hong‡ et al’s paper on prescribing of aspirin and   sues is vital for our society as a whole.
                           statins in rest-homes5 has fuelled further discussion
                           on giving cardio-protective drugs to the elderly.       Men’s health is by no means the only item on the
                                                                                   agenda for this issue. Turner and colleagues have
                           This issue has a men’s health focus. The health of      developed a model for viewing all components of
                           our men contributes greatly to the health of our        the cost of providing childhood immunisations.
                           nation. Overall men have a poorer health status         They have shown that the current government
                           than women and use our health services less fre-        subsidy does not provide adequate reimburse-
                           quently. They die earlier than women and more           ment, with each immunisation being delivered at
                           of their deaths are avoidable.6                         a net cost to the practice.11 A Christchurch study
                                                                                   looks at GP and practice nurse knowledge and
CORRESPONDENCE TO:         A number of research papers address these issues.       attitudes about the human papillomavirus (HPV)
Felicity Goodyear-Smith    Jatrana and Crampton examine the relative under-        and HPV vaccines.12 On a completely different
Associate Professor,       utilisation of general practice services by men,        tack, another Christchurch paper explores linking
Department of General
Practice and Primary
                           which cannot be accounted for by gynaecological         the National Heath Index (NHI) to general prac-
Health Care, Faculty       and obstetrical conditions nor women’s excess in        tice and other data sources to reliably contribute
of Medical and Health      visits in the child-bearing years,7 while McKinlay      to a district database.13
Sciences, The University
of Auckland, PB 92019,
Auckland, New Zealand      * Maori flax basket
f.goodyear-smith@          †	Sweet potato storage pit
auckland.ac.nz             ‡	See Errata

256                                                              VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
EDITORIALs
                                                                                                                                        from the editor

An improving performance paper shows another
way of using available electronic data. Clinical                          Errata
data from practice management systems can allow
                                                                          The name of the first author of the paper Use of aspirin and statins for cardio-
benchmarking of usual care by practices, and pro-
                                                                          vascular risk reduction in New Zealand: the residential care story. J Primary
vide a standard against which to measure quality
                                                                          Health Care. 2009;1(3)184-189 is Jae Hong not Hoem. Corresponding author
cycle improvements. In this case, a benchmark for
                                                                          Prof. Ngaire Kerse sincerely apologises for this error.
gout control was determined using the proportion
of patients with well-controlled serum uric acid
                                                                          The String of PEARLS are based on the PEARLS developed by Prof. Brian
and then this was used to trial a mail and phone
                                                                          McAvoy. Our apologies for not acknowledging his contribution in the
intervention to improve gout control.14
                                                                          September issue.

These are just some of this issue’s offerings.
Given the depth and breadth of papers spanning                        6. Johnson L, Huggard P, Goodyear-Smith F. Men’s health and
diverse aspects of primary health care which are                          the health of the nation. NZ Med J. 2008;121(1287):69–76.
now awaiting publication in the JPHC, readers                         7. Jatrana S, Crampton P. Gender differences in general
                                                                          practice utilisation in New Zealand. J Primary Health Care.
can anticipate a wide array of articles. Volume 2                         2009;1(4):261–269.
therefore is unlikely to be themed; rather an                         8. McKinlay E, Kljakovic M, McBain L. New Zealand men’s health
exciting assortment of contributions are in store                         care: are we meeting the needs of men in general practice? J
                                                                          Primary Health Care. 2009;1(4):302–310.
for our 2010 readers.                                                 9.	Sandiford P. Getting back the missing men of Aotearoa:
                                                                          Declining gender inequality in NZ life expectancy. J Primary
References                                                                Health Care. 2009;1(4):270–277.
                                                                      10. Barwell P. Do invitations to attend well men checks result
1. Arroll B, Kerse N. Back to Back: GPs should prescribe more             in increased male health screening in primary health care? J
   benzodiazepines for the elderly. J Primary Health Care.                Primary Health Care. 2009;1(4):311–314.
   2009;1(1):57–60.                                                   11. Turner N, Rouse P, Airey S, Petousis-Harris H. The cost of im-
2. Elley R, Toop L. A polypill is the solution to the pharmacologi-       munising at the general practice level. J Primary Health Care.
   cal management of cardiovascular risk. J Primary Health Care.          2009;1(4):286–296.
   2009;1(3):232–236.                                                 12. Henninger J. Knowledge, attitudes, and intentions of general
3. Gilmer M, Smith M, Gorman D. Back to Back: The nurse practi-           practitioners and practice nurses in Christchurch about HPV
   tioner provides a substantive opportunity for task substitution        and HPV Vaccines. J Primary Health Care. 2009;1(4):278–285.
   in primary care. J Primary Health Care. 2009;1(2):140–143.         13. Malcolm L, Barnett R. Variation in Partnership Health
4.	Smart R, Tulloch D. Back to Back: New Zealand should                   general practice enrolment data related to need and hospital
   introduce population screening for prostate cancer using PSA           and national records on ethnicity. J Primary Health Care.
   testing. J Primary Health Care. 2009;1(4):319–322.                     2009;1(4):297–301.
5. Hong J, Kerse N, Scahill S, Moyes S, Chen C, Peri K, et al. Use    14. Arroll B, Bennett M, Dalbeth N, Hettiarachchi D, Cribben B,
   of aspirin and statins for cardiovascular risk reduction in New        Shelling G. More allopurinol is needed to get gout patients
   Zealand: the residential care story. J Primary Health Care.
EDITORIALs
      guest editorial

                       Developing men’s awareness
                       of health issues

                       I
Lannes Johnson            s there a need for New Zealand (NZ) to                     The review confirmed that health outcomes were
MBChB, FRNZCGP,           develop, or encourage, men’s awareness of                  poorer for New Zealand men than women, in
MMedSci (Hons)            health issues? Awareness by men themselves,                terms of morbidity, mortality and life expectancy.
                       their children, their partners, or all of the above?          The literature identified several factors proven
                       Would there be benefits in respect of health gain             or suspected to cause the disparities in health
                       including quality of life, with a resulting reduc-            outcomes between men and women. There was,
                       tion in secondary care health expenditure, or in              however, little agreement on which of these fac-
                       the country’s productivity, with a consequent                 tors impacted most on men’s health, and how to
                       improvement in NZ’s gross domestic product?                   address these factors. The findings from the review
                                                                                     suggested more in-depth research was needed to
                       There is no dispute regarding the gender mortal-              provide a foundation for effective strategies to
                       ity and morbidity differences between men and                 improve men’s health.2
                       women in NZ; what is uncertain is the aetiol-
                       ogy of the disparity and thus how to alleviate              In 2006 HealthWEST Primary Health Organisa-
                       it. Men’s shorter lives have not been shown to              tion (PHO) was commissioned by the then Min-
                       be due to biological differences and behavioural            ister of Health (Pete Hodgson) to research men’s
                       differences may account for some disparities (e.g.          health in NZ and investigate actions that could
                       accidents, suicides, cancer and deaths from cardio­         improve men’s health. The authors looked at the
                       vascular disease), but certainly in NZ we do                economic ramifications of poor health in the
                       spend a lot more on women’s health. The role of             workforce, examined men’s attitudes to health
                       this differential allocation of health budget has           and made recommendations to the Minister:
                       not been fully investigated. Professor White, one
                       of the first chairs in men’s health in the United             Health is not simply a by-product of economic
                       Kingdom (UK) commented:                                       development, but is a substantial driver of economic
                                                                                     development as well. The health of the population
                           Men’s health is not a medical issue; it is societal.      affects a country’s productivity, labour supply,
                           Therefore a much broader approach needs to be             education levels, and capital formation. Healthy
                           taken. This leads us into research questions around       people learn better, live longer—and work, earn,
                           men’s lifestyles and the social pressures on men          and save more.3
                           to conduct their lives in certain ways; it makes us
                           look at social structures, including education, work,   Limited awareness of health issues may lead to
                           leisure.1                                               poor health and one of the fundamentals for
CORRESPONDENCE TO:                                                                 improving health in a population is improv-
Lannes Johnson
Clinical Director,     In December 2004 the Public Health Advisory                 ing health literacy; the development by Janine
Harbour Health,        Committee (PHAC) commissioned a literature                  Bycroft of Health Navigator is one tool to ad-
PO Box 9, Greenhithe   review on men’s health. The review, which was               dress this (http://www.healthnavigator.org.nz/).
Auckland 0756,                                                                     The success of the cervical smear and breast
                       both comprehensive and excellent, was carried out
New Zealand
ljohnson@              by Eileen McKinlay of the Wellington School of              screening campaigns relied on women’s aware-
harbourhealth.org.nz   Medicine and Health Sciences, Otago University:             ness of the associated health issues. There has

258                                                              VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
EDITORIALs
                                                                                                                guest editorial

been little in the way of corresponding national           chair in men’s health (despite the altruistic,
awareness campaigns for men in NZ and, inter-              academic and economic justification for this)
nationally, awareness efforts have been poorly             and actions to improve men’s health have been
evaluated:                                                 largely left to employers who recognise the value
                                                           of good health in the workforce, a few passion-
  Only a paucity of interventions have been com-           ate individuals and concerned non-government
  prehensively monitored and evaluated, and which          organisations.
  in turn have shown clear beneficial impact on
  men’s health. However there is potential for men’s       Men in NZ visit a GP less often than women but,
  health awareness activities to catalyse interest in      more importantly, they engage less in comprehen-
  health and to seek advice or support. Three possible     sive health checks2 and, except for cardiovascular
  benefits of men’s health activities are: raised aware-   disease/diabetes screening, there is limited sup-
  ness of health issues, connecting men with health        port for the practice team to manage this. ‘There
  or other support networks, and some degree of            are barriers to overcome if the practice team is
  behaviour change.3                                       to undertake health promotions within general
                                                           practice consultations.’4
The need to promote health awareness in men
has been recognised by many national groups,               It is possible that systematic population
notably the Cancer Society, the Prostate Can-              screening and raising health awareness, with

Men’s shorter lives have not been shown to be due to biological
differences and behavioural differences may account for some
disparities (e.g. accidents, suicides, cancer and deaths from
cardiovascular disease), but certainly in NZ we do spend a lot
more on women’s health
cer Foundation, Aged Concern, a number of                  specific focus on ethnicity and socioeconomic
men’s action groups, and a (very) few District             issues, may address some of the gender dispari-
Health Boards and PHOs. An excellent publica-              ties and reduce health and societal costs in the
tion by rural general practitioner, Dave Baldwin           community:
(Healthy Bastards) provides comprehensive men’s
health advice (and includes a chapter on women’s             Men have a lower life expectancy than women,
health for male edification). There has been the             and there are enormous costs associated with
occasional programme on TV and a (very) few                  premature death and disability that impact
press releases that relate to men’s health. There            families, employers, and society as a whole. Men
is no organised ‘Men’s Health Movement’ despite              play a critical role in families as fathers and
international examples and academic recogni-                 sons providing care and support to other family
tion of men’s health as an indexed term (MeSH                members. As members of the workforce, they
or Medical Subject Headings) in MEDLINE/                     are employers and employees whose health and
Pubmed in 2008.                                              well-being greatly affect productivity and eco-
                                                             nomic well-being. Improving the health of men
However, unlike Australia, the United States                 through early detection of male health problems
and UK, NZ has no declared government policy                 and timely treatment of disease can result in
on men’s health; no national men’s awareness                 reduced morbidity and mortality resulting in
day, no Ministry of Men’s Affairs, no academic               benefits for men, families, and society.5

VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE                                                               259
EDITORIALs
      guest editorial

                    The Ministry of Health’s website, under ‘men’s             have a particular perception of health which may
                    health’, reveals an encouraging commitment                 mean that they do not always recognise when to
                    (http://www.moh.govt.nz/menshealth):                       seek help and may find it difficult to engage with
                                                                               the health services.6
                        The Ministry of Health is working on programmes
                        and initiatives aimed at encouraging men to be         Goodyear-Smith and Birks have commented
                        more aware of their health and to access healthcare.   on the disadvantages of a gendered approach
                        These include:                                         to health and advocates a more targeted health
                        • providing targeted men’s health checks at            policy:
                             convenient times and locations
                        • supporting workplace based men’s health                 New Zealand governmental agencies promote a
                             initiatives                                          gendered approach to health care policy and serv-
                        • establishing a men’s health innovation fund             ice delivery on the basis that women have special
                             to support community based men’s health              health needs not met by the existing health
                             initiatives                                          services. We argue against such an initiative on
                        • developing a men’s health social marketing              the basis that giving priority for female services
                             campaign                                             disadvantages males, who already have higher
                        • improving access to good quality men’s health           morbidity and mortality than women. A needs
                             information by supporting existing websites,         rather than advocacy-driven public health policy
                             telephone health services and a range of infor-      directed at high-risk groups for specific health
                             mation pamphlets                                     problems rather than specific populations may be
                                                                                  a more efficient, equitable and effective means of
                    These programmes seem to be in abeyance at the                disease prevention and treatment.7
                    present time, although there is a small research
                    project looking at the ‘burden of risk’ (cardio-           PHOs definitely have a role in addressing these
                    vascular, major cancers, self-harm, depression)            difficulties, but a national policy on men’s health
                    in working men in Waitakere who have not                   could set the pace. Without political leadership
                    experienced a comprehensive health check in the            from the Ministry of Health and possibly the
                    previous five years.                                       financial sector, progress will be slow. Improving
                                                                               men’s health is critical to improving productivity
                        Although addressing inequalities in health in NZ       and thus economic recovery.
                        is a key focus of health strategy and policy, men’s
                                                                               References
                        health does not specifically feature in this regard.
                        Rather, the focus is more on addressing inequalities   1. White AK. Men’s health in the 21st century. Int J Men’s
                                                                                  Health. 2006;5(1):1–17.
                        patterned by ethnicity and deprivation, and issues     2. McKinlay E. Men and health: a literature review. Wellington:
                        of men’s health within these groups appears at best       Wellington School of Medicine; January 2005.
                        in the margins.6                                       3. Johnson LF FA, Stephenson P. A review of the benefits of
                                                                                  men’s health awareness activities and a proposal for the devel-
                                                                                  opment of a targeted men’s health programme. In: Healthwest
                    The McKinlay review highlighted many initia-                  PHO; 2006. p. 1–57.
                    tives to improve men’s health; however the issue           4. McKinlay E, Plumridge L, McBain L, McLeod D, Pullon S,
                                                                                  Brown S. What sort of health promotion are you talking
                    may be less of awareness and more of availabil-               about?: A discourse analysis of the talk of general practition-
                    ity; in primary care many practices are not ‘man              ers. Soc Sci Med. 2005;60:1099–1106.
                    friendly’. Hours of opening do not accommodate             5. Rich J, Ro M. A poor man’s plight: Uncovering the disparities in
                                                                                  men’s health. A series of Community Voices Publications. Feb
                    men’s difficulties in time away from work, prac-              2005, Kellogg Foundation. p 38.
                    tice nurses are busy with women and children,              6. Johnson L HP, Goodyear-Smith F. Men’s health and the health
                    and the concept, and promotion, of a comprehen-               of the nation. NZ Med J. 2008;121(1287).
                                                                               7. Goodyear-Smith F, Birks S. Gendered approaches to health
                    sive men’s health check (tailored to age) may not             policy: how does this impact on men’s health? NZ Fam Phys.
                    be well supported in all practices. Men appear to             2003;30(1):23–29.

260                                                          VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
ORIGINAL SCIENTIFIC PAPERS
                                                                                                  quantitative research

Gender differences in general
practice utilisation in New Zealand
Santosh Jatrana PhD, MPhil, MA, BA (Hons), PGD (Public Health); Peter Crampton MBChB, PhD, FAFPHM,
MRNZCGP

 ABSTRACT
 Introduction: This paper aims to examine gender differences in general practice utilisation in New
 Zealand.

 Methods: The data for this research came from 10 506 visit records gathered from 246 general practition-
 ers (GPs) who took part in the National Primary Medical Care Survey (NatMedCa), a nationally representa-
 tive, multistage, probability sample survey of GPs and patient visits conducted in 2001/2002. The number
 of visits to a general practice in the last 12 months among those patients who visited the GP at least once
 during the past 12 months was used as the outcome variable. Poisson regression was used for analysis.

 Results: Women were more likely than men to visit a GP over the last 12 months (IRR=1.13; 95% CI:
 1.03–1.24). We also found significant female excess in utilisation of GP services even after excluding
 gynae­cological and obstetric conditions and across all age groups. Asian were 39% less likely than Euro-
 pean women to visit a GP (IRR=0.61; 95% CI: 0.43–0.85); a result that was not reflected in men’s utilisa-
 tion of GP services. In addition, we found that women visiting GPs were 39% more likely to have reported
 ‘life-threatening’ problems as compared to ‘self-limiting’ problems (IRR=1.39; 95% CI: 1.00–1.94).

 Conclusion: Our results do not support the body of literature that suggests that women’s excess
 in service use can largely be attributed to gynaecological and obstetrical conditions or that the female
 excess in visits is focussed in the childbearing years. Ethnicity and the severity of a problem contributed
 significantly to explaining women’s, but not men’s, utilisation of GPs.

 Keywords: Gender differences; health services utilisation; New Zealand

Introduction
While gender differences in health, assessed             not important in explaining the sex difference in
in terms of mortality and morbidity, have been           consultation rates.22 Still others indicate that dif-
reported in most developed countries over recent         ferences are due to different experience of symp-
decades, less attention has been paid to the use         toms rather than willingness to consult.14,23–27
                                                                                                                 J PRIMARY HEALTH CARE
of health care services. Research from developed         Further studies suggest that males and females          2009;1(4):261–269.
countries on patterns of health service use sug-         do not differ in symptom reports for specific dis-
gests that women’s rate of utilisation of almost         eases where symptoms tend to be powerful and
all health services is higher than that of men.1–17      obvious.24 Some scholars found no support for the       CORRESPONDENCE TO:
However, some researchers have challenged the            notion that women are more likely than men to           Santosh Jatrana
stereotype of women being more likely to use             seek help for any particular problem.4                  Research Fellow,
                                                                                                                 Department of Public
health services.18–20 For example, some scholars
                                                                                                                 Health, School of Medicine
have suggested that the largest female excess            Clearly, these explanations are not mutually            and Health Sciences,
in attendance is during childbearing years;21            exclusive. They do, however, serve to illustrate        University of Otago,
others argue that gynaecological and obstetrical         the complexity of the association between gender        Wellington
                                                                                                                 PO Box 7343, Wellington,
conditions contribute significantly to the differ-       and health services utilisation and warrant on-
                                                                                                                 New Zealand
ence, whereas consultation for ‘vague’ or mild           going examination of the topic. The present study       santosh.jatrana@
symptoms, or ‘symptoms without disease’ are              examines gender differences in general practice         otago.ac.nz

VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE                                                                    261
ORIGINAL SCIENTIFIC PAPERS
      quantitative research

Table 1. Characteristics of patients and visits
                                                                                                    utilisation in New Zealand (NZ) by addressing
 Characteristics                                                 N              Percentage
                                                                                                    three specific questions:
 Predisposing characteristics
                                                                                                    • To what extent is there variation in general
 Age group (years)
                                                                                                       practice utilisation between men and women?
 0–15                                                      2032/10506                19.3
                                                                                                    • To what should these differences, if there
 16–24                                                       919/0506                8.8
                                                                                                       are indeed differences, be attributed?
 25–34                                                     1670/10506                15.9
                                                                                                    • Are there gender differences in the de-
 35–44                                                     2593/10506                24.7
 45–54                                                     1083/10506                10.3
                                                                                                       terminants of GP utilisation?
 55–64                                                     2064/10506                19.6
 65+                                                        145/10506                 1.4           Thus, we aim to contribute to the debate on the
 Gender                                                                                             nature of differences in GP visits between men and
 Males                                                     4341/10430                41.6           women. Examining gender differentials in general
 Females                                                   6089/10430                58.4           practice utilisation in a NZ context is important
 Missing                                                       76                                   at least for two reasons. First, as suggested in a
 Ethnicity of patients                                                                              number of recent NZ papers, gender has received
 NZ European                                               6794/10319                65.8           less attention in a range of areas, including re-
 Maori                                                     1730/10319                16.8           search.28–30 Research on the reduction of social in-
 Pacific                                                    721/10319                 7.0           equalities in health and in access to health care has
 Asian                                                      499/10319                 4.8           focussed on socioeconomic and ethnic inequalities,
 Other                                                      574/10319                 5.6           and gender differentials in health service utilisa-
 Missing                                                       187                                  tion have received less attention in NZ. Second,
 Marital status                                                                                     the bulk of research on gender differentials in
 Married                                                    4001/7783                51.4           health service utilisation has been carried out on
 Unmarried/Never married                                    3782/7783                48.6           European and American data and evidence from
 Missing                                                      2723
                                                                                                    NZ may validate existing knowledge and provide
 NZDep 2001 quintile*
                                                                                                    greater understanding of how the association
 1                                                          1575/8940                17.6
                                                                                                    between gender and health service utilisation is
 2                                                          1552/8940                17.4
                                                                                                    manifest across diverse social environments.
 3                                                          1628/8940                18.2
 4                                                          1791/8940                20.0
                                                                                                    The conceptual framework of this study draws on
 5                                                          2394/8940                26.8
 Missing                                                       1566
                                                                                                    the health behaviour model (HBM).31 The HBM
 Enabling resources                                                                                 considers the use of health services as a function
 Community Service Card (CSC)†,‡                           4992/10197                49.0           of predisposing, enabling and need factors. The
 High Use Health Card (HUHC)†,‡                             519/9647                 5.4            predisposing component involves characteristics
 Need component–practitioner perception                                                             existing prior to the onset of disease, which reflect
 Urgency of the visit                                                                               a person’s propensity to contact a doctor given cer-
 ASAP & today                                               3955/8476                46.7           tain health problems. The enabling component re-
 This week                                                  4521/8476                53.3           fers to conditions that facilitate or inhibit the use
 Missing                                                      2030                                  of health care facilities, such as health insurance,
 Severity of the problem                                                                            availability and affordability of health services,
 Life-threatening                                            210/7893                2.7            family and work obligations. The need component
 Intermediate                                               4153/7893                52.6           reflects the urge to seek health care because of the
 Self-limiting                                              3530/7893                44.7           individual’s objective or subjective health.
 Missing                                                       2613
 N of cases                                                   10506                 100.0           Methods
Source: National Primary Medical Care Survey, 2000
                                                                                                    Data
* NZDep 2001 is a census-based small-area index of deprivation, where 1=the least deprived 20% of
  areas, and 5=the most deprived 20% of areas.
                                                                                                    The data for this research are based on 10 506
† The CSC and HUHC are benefit cards that entitle the user to higher levels of government payment
  for consultations and prescriptions, thus reducing the amount of patient co-payment; the CSC is
                                                                                                    visit records gathered from 246 GPs who took
  means-tested and indicates low income.                                                            part in the National Primary Medical Care
‡ These variables were coded as ‘yes/no’. The ‘no’ rows are not shown.                              Survey (NatMedCa).32 NatMedCa, carried out

262                                                                             VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
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over 2001/2002, was a nationally representative,
multistage, probability sample of GPs and patient       WHAT GAP THIS FILLS
visits. The primary purpose of the survey was to
                                                        What we already know: Previous studies have reported that women’s
collect data on the content of patient visits. For
                                                        rate of utilisation of almost all health services is higher than that of men. One
two periods, each of one week, every selected GP
                                                        of the explanations for this difference has been that gynaecological and
completed a questionnaire for a 25% systematic
                                                        obstetrical conditions contributed significantly to this difference and that the
sample of patient visits. The questionnaire was
                                                        largest female excess in attendance is during childbearing years.
adapted from the annual US National Ambulatory
Medical Care Survey (NAMCS) http://www.cdc.             What this study adds: Women are more likely than men to utilise GP
gov/nchs/about/major/ahcd/ahcd1.hrm; accessed           services across all age groups and even after excluding gynaecological and
25 June 2006). The overall GP response rate was         obstetrical conditions. Determinants of GP consultation differed between the
71.1%, calculated as the proportion of eligible GPs     sexes. Ethnicity and severity of problem contributed significantly to explain-
in the sample who completed patient visit survey        ing women’s, but not men’s, utilisation of GPs.
forms for both one-week survey periods.
                                                       in New Zealand: Maori, if any of the responses
In order to obtain a nationally representative         to self-identified ethnicity were Maori; Pacific, if
sample, geographic locations were sampled and          any one response was Pacific but not Maori; Asian,
GPs were sampled from locations, stratified by         if any one response was Asian but not Maori or
organisation type (independent; independent            Pacific; and the remainder non-Maori non-Pacific
practitioner association; capitated; community-        non-Asian (nMnPnA) (mostly New Zealanders
governed not-for-profit) and rural/urban (metropo-     of European descent, but strictly speaking not an
lis and cities; towns and rural areas). GP and visit   ethnic group). The NZDep 2001 index of socioeco-
weights were calculated to take account of differ-     nomic deprivation was used as a measure of socio-
ent sampling probabilities, so that approximately      economic position. It is a census-based small-area
unbiased estimates of proportions, means and           index of deprivation.34 The index scale used here
measures of association could be calculated.33         is from 1 to 5, where 1 is the least deprived 20% of
                                                       areas and 5 is the most deprived 20% of areas. The
                                                       CSC (community services card) and HUHC (high
Measurement
                                                       use health card) are benefit cards that entitle the
The independent variable for this analysis is gen-     user to higher levels of government payment thus
der, categorised as men and women. ‘Men’ is the        reducing the amount of patient co-payment; the
reference group. The outcome variable is the self-     CSC is means tested and indicates low-income.
reported number of visits to a general practice in
the last 12 months among those patients who vis-
                                                       Statistical analysis
ited a GP at least once during the past 12 months.
The utilisation of GP services was hypothesised to     Since the main dependent variable—the number
depend on predisposing, enabling and need factors.     of visits to the GP in the last 12 months—is a
The specific aim was to explore the extent to which    count variable which can only take non-negative
observed gender differences, if there are any, are     integer values, a count regression was appropri-
explained by the predictor variables (predisposing,    ate.35,36 Hence, Poisson regression analyses were
enabling and need factors) considered separately       used to examine the gender differences in visits
and together. Predisposing, enabling and need          to a GP and also to examine the contribution of
factors selected as independent variables were         predisposing and enabling factors to individuals’
respectively (a) age, ethnicity, marital status and    visits to a GP. Children below age 16 years were
NZDep 2001 quintile; (b) community service card        excluded from the sample for regression analyses
(CSC) status, high use health card (HUHC) status;      on the assumption that up to perhaps the mid
and (c) urgency and severity of visit (Table 1). We    teens, the person making the decision to visit
have used ‘prioritised’ ethnicity in this paper.       the doctor is unlikely to be the patient. Usually
In the ‘prioritised’ concept, each respondent was      it will be a parent, and most likely the mother.
assigned to a mutually exclusive ethnic group by       In these analyses, the regression coefficient b
means of a prioritisation system commonly used         is more easily interpreted as an incidence rate

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ORIGINAL SCIENTIFIC PAPERS
      quantitative research

                                                                           Ethical approval
                   ratio, eb, which measures the expected change in
                   the dependent variable as a result of a one-unit        NatMedCa (National Primary Medical Care
                   change in the predictor variable. The incidence         Survey) on which the present study is based, was
                   rates for the dependent variable in each of the         approved by the New Zealand Ethics Committee
                   predictor variable categories are compared to the       which reviews national and multi-regional studies.
                   incidence rate for the reference category. The
                   incidence rate for the reference category of each       Results
                   predictor is unity. Statistical analyses were under-
                                                                           Bivariate relationships between gender and GP
                   taken using the SUDAAN statistical package,37
                                                                           utilisation are reported in Table 2, 3 and 4. There
                   allowing estimates to take account of clustering,
                                                                           was a significant difference between men and
                   stratification and weights.38 Age standardisation
                                                                           women in the average number of visits to the
                   was carried out using the direct method, with the
                                                                           practice in the previous 12 months (5.4 and 6.3,
                   2001 census population as the standard.
                                                                           respectively; p=0.00). There was also a difference
                                                                           between men and women in the average number
                   To determine whether gender differences in the
                                                                           (age standardised) of problems diagnosed (ICD-9-
                   utilisation of GP services could be eliminated by
                                                                           CM) per visit (1.5 and 1.7 problems, respectively;
                   controlling for the predictor variables, both uni-
                                                                           p=0.006). However, there was no significant
                   variate and multivariate models were fitted. The
                                                                           gender difference between men and women in
                   statistical analysis was performed stepwise. First,
                                                                           the average duration of visit (14.78 and 15.09
                   a univariate Poisson regression model (Model 1,
                                                                           minutes, respectively). A higher proportion of
                   Table 5) was fitted to examine the gross effect of
                                                                           male patients visited for administrative (8.33% vs
                   gender on GP attendance. Second, four multivari-
                                                                           5.98%; p=0.01), medical (57.8% vs 53.8%; p=0.03)
                   ate models, based on theoretical considerations,
                                                                           and surgical (44.8% vs 39.6%; p=0.01) reasons
                   were estimated. Models 2, 3 and 4 (Table 5)
                                                                           (Table 3). Except for musculoskeletal, genitouri-
                   estimated the gender differences in GP attend-
                                                                           nary, and rheumatologic reasons, there were no
                   ance after separately controlling for predisposing,
                                                                           significant gender differences in the reported
                   enabling and need factors respectively. Finally,
                                                                           diagnosis for the visits (Table 4). Men were more
                   Model 5 (Table 5) achieved the same objective af-
                                                                           likely to visit for musculoskeletal, and rheumato-
                   ter controlling for predisposing, enabling and need
                                                                           logic diagnosis while women were more likely to
                   factors simultaneously. Following Verbrugge’s
                                                                           visit for genitourinary reasons.
                   argument (1985) that utilisation due to sex-specific
                   morbidities and preventive care (e.g. reproductive-     Results from the univariate Poisson regression
                   related contacts) should be removed in analyses         analysis (Model 1, Table 5) show that women
                   assessing the effects of gender, we excluded female     were 14% more likely than men to visit a GP over
                   reproductive diagnoses from the total sample and        a 12-month period. Controlling for predisposing
                   again ran regression analyses of utilisation of GP      factors increased the gender difference in the use
                   services (results not shown). We also conducted         of GP services and women were 23% more likely
                   separate Poisson regression models for men and          to use GP services (Model 2, Table 5) than men.
                   women in order to examine whether the determi-          Controlling for enabling (Model 3, Table 5) and
                   nants of utilisation of GP services were different      need (Model 4, Table 5) factors brought down
                   according to the gender of the patient (Table 6). A     gender differences in the use of GP services
                   variable was considered significantly associated        below the unadjusted gross model (Model 1),
                   with GP attendance when its p-value was below or        however differences still remained highly signifi-
                   equal to 0.05. The c2 test was used to compare male     cant. For example, after controlling for enabling
                   and female categorical variables, with p-values         and need factors, as in Model 3 and 4 respec-
                   computed from the Wald c2 using denominator de-         tively, women were respectively 9% and 12% more
                   grees of freedom equal to the number of sampling        likely than men to use GP services. Controlling
                   units minus the number of strata. For continuous        simultaneously for predisposing, enabling and
                   variables, t-tests and associated p-values were used.   need factors (Model 5), the probability of visiting
                   We also examined possible interactions between          a GP over the last 12 months was 13% higher for
                   gender and predictor variables.                         women as compared to men.

264                                                      VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
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The results also show that being older, being of         Table 2. Gender differences in average visit duration and number of visits in previous 12
European ethnicity, holding a CSC or HUHC,               months (age-standardised)
having a ‘life-threatening’ problem, urgency of                                                              Males             Females             P-value*
visit ‘the same day’ were all significantly related                                                        (n=3664)            (n=5192)
with increased utilisation of GP services. As op-            Average visit duration (minutes)
                                                             Total                                             14.8                15.1               0.29
posed to previous studies marital status was not a
                                                             NZDep 2001 = 1                                    16.2                15.5               0.29
predictor of gender differences in the utilisation           NZDep 2001 = 5                                    13.9                14.4               0.33
of GP services in this study (Table 5); neither              Average number of visits to
did it work differently for men and women                    practice in previous 12 months
(Table 6).39,40 We repeated all the models after             Total                                             5.4                 6.3                0.00
                                                             NZDep 2001 = 1                                    4.4                 6.1                0.00
excluding gynaecological and obstetrical diag-
noses from the total sample. Our results did not         Source: National Primary Medical Care Survey, 2000
change (results not shown). Gender still remained        *     NZDep2001 is a census-based small-area index of deprivation, where 1=the least deprived 20% of
                                                               areas, and 5=the most deprived 20% of areas.
an independent predictor in all the models.

In order to identify gender differences in the           Table 3. Proportions of all diagnoses categorised into major groupings (age-standardised)*
determinants of utilisation of GP services, Poisson          Diagnosis                     Male (N)                  Female (N)                 P-value
regression analyses were carried out separately for                                        (n=3553)                   (n=5063)
men and women (Table 6). The results show be-                Administrative†                  8.3                        6.0                        .01
ing older and holding a CHC or HUHC were all                 Medical                         57.8                       53.8                        .03
significantly related with the increased utilisation         Surgical                        44.8                       39.6                        .01
of GP services for both men and women. There was         Source: National Primary Medical Care Survey, 2000
no significant difference in the utilisation of GP       *     Analysis limited to those visit records with disease data coded; totals sum to greater than 100%
services between those living in the most deprived             because of multiple reasons for visits in some instances.

areas and the least deprived areas for both men and      †	Visits for documentation to be completed, and preventive care.

women. However, ethnicity and need factors had
differential effects on service use for men and wom-     First, in line with the literature, gender appeared
en. While both Asian men and women have a lower          to exert an important and independent effect on
number of GP visits than the number of visits by         the utilisation of GP services, with women having
European men and women respectively, the results         higher utilisation rates than men.3-16,39 However,
are significant only for Asian women who had 39%         our results do not support the body of literature
fewer GP visits than European women. Interest-           that suggests that women’s excess in service use
ingly, Maori men have more GP visits than Maori          can largely be attributed to gynaecological and
women; however, the results are not statistically        obstetrical conditions.22 We ran the regression
significant. The need factors also seemed to be more     analyses after excluding gynaecological and
closely related with utilisation behaviour among         obstetrical diagnoses, and still found an excess of
women. Women visiting the GP were 39% more               female visits as compared to men. In that respect
likely to have reported ‘life-threatening’ problems      we generally agree with Briscoe3 who found an
as compared to ‘self-limiting’ problems. There was       excess of female consultations even after exclusion
no evidence of any interaction between gender            of sex-specific consultations for pregnancy and
and any of the predictor variables that we tested for.   postnatal examinations. The study does not sup-
                                                         port the view that sex-specific conditions explain
                                                         excess primary health care utilisation by women.
Discussion
This study explored the impact of gender on the          Second, age, CSC and HUHC were predictors
utilisation of GP services in NZ. We also exam-          of utilisation of GP services in both men and
ined systematically the extent to which predispos-       women. In general, there was a positive relation-
ing, enabling and need factors might explain the         ship in the use of GP services with age for both
frequently noted gender difference in use of health      men and women. However, women exceeded men
services, in our case the utilisation of GP services.    in visits to the GP across all age groups, thus
Many important findings emerge from this study.          refuting the frequently noted reason for female

VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE                                                                                           265
ORIGINAL SCIENTIFIC PAPERS
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Table 4. Treated prevalence (%) of major expanded diagnostic clusters (MEDCs) (age-                     tion behaviour in women than in men. NZ wom-
standardised)*                                                                                          en are more likely than men to visit a GP when a
                                                                                                        problem is serious (Table 6). Our results diverge
    Diagnosis                                   Male                Female              P-value
                                              (n=3553)             (n=5063)
                                                                                                        from those of Briscoe (1987) who found need fac-
    Ear/nose/throat                              17.1                15.2                  .13          tors to be significantly associated with consulting
    Musculoskeletal                             15.4                  11.8                 .00          behaviour among men, but not among women,
    Cardiovascular                              10.9                   9.5                 .12          and those of Parslow et al.15 who found need
    Skin                                        15.2                 13.8                  .21          factors to have a significant impact on both men’s
    Psychosocial                                10.1                  11.9                 .09          and women’s use of GP services as well as obtain-
    Respiratory                                  9.3                  8.4                  .34          ing additional services. One explanation for this
    Allergy                                       7.1                  6.1                 .26          divergence could be the use of different measures
    General surgery                              5.8                  6.5                  .42          of need; in Briscoe’s case, physical health status
    Gastrointestinal/hepatic                     7.7                  6.6                  .17          and the number of physical symptoms experi-
    Endocrine                                    3.4                  3.5                  .89
                                                                                                        enced over the past 12 months was used and, in
    Neurologic                                   5.4                  6.6                  .15
                                                                                                        the case of Parslow et al., self-assessed physical
    Genitourinary                                2.6                  3.8                  .05
                                                                                                        and mental health were used. However, the di-
    Eye                                          3.2                  2.8                  .41
    Administrative                               8.3                  6.0                  .01
                                                                                                        vergence also underlines the different meaning of
    Infectious                                   3.1                   3.0                 .85          health needs for men and women, suggesting that
    Rheumatologic                                2.5                   1.2                 .02          women may be more willing to admit the urgency
    Reconstructive                               2.6                   1.6                 .07          and severity of an illness and seek help. It may
    Malignancies                                 1.8                  0.9                  .02          also be possible that women are more interested
    Nutrition                                    1.0                   1.6                 .10          in health matters and more aware of existing and
    General signs and symptoms                   3.6                   4.1                 .38          potential health problems, and therefore more
    Dental                                       0.7                  0.5                  .38          likely to obtain services from their GP, especially
    Haematologic                                 0.6                  0.9                  .27          with urgent and severe illnesses. In comparison,
    Renal                                        0.5                  0.4                  .57          men may be less concerned and knowledgeable
    Toxic effects                                0.5                  0.7                  .44          about their health and, consequently, less likely
    Genetic                                      0.3                   0.1                 .09
                                                                                                        to obtain health services. It is possible that NZ
Source: National Primary Medical Care Survey, 2000                                                      men use hospital emergency services for urgent
*    Analysis limited to those visit records with disease data coded. There were up to four diagnoses   and life-threatening conditions or that they visit
     per visit.                                                                                         specialists, while women use GPs. More detailed
                                                                                                        studies are needed for a better understanding of
                                    excess being obstetric-related.21 Holding a CSC                     the reasons and underlying meaning of gender
                                    or a HUHC was also positively associated, as                        differences in the utilisation of health services.
                                    expected, with high utilisation of GP services for
                                    both men and women, as these cards entitled the
                                                                                                        Strengths and limitations
                                    holder to lower co-payments.
                                                                                                        A major strength of the study is that the data de-
                                    Our third major finding is the differential effects                 scribe patient visits to a nationally representative
                                    of ethnicity and need on use of GP services for                     sample of GPs. However, there are several limita-
                                    men and women. While both Asian men and                             tions to this study. First, bias may have been
                                    women have a lower number of GP visits than                         introduced as a result of the overall GP response
                                    European men and women respectively, the                            rate of 76.7%. Non-responders tended to be male
                                    results are significant only for Asian women who                    and reported greater than average patient loads. If
                                    had 39% fewer GP visits than European women.                        the characteristics of patient visits to the busiest
                                                                                                        GPs differed in some systematic way, this may
                                    Similarly, the findings from the separate regres-                   bias the results. The magnitude and direction of
                                    sion analyses for men and women (Table 6) clearly                   such bias is unknown.
                                    demonstrate a close relationship between consul-
                                    tation behaviour and severity of the problem in                     Second, as the study is based on a cross-sectional
                                    women but not in men, suggesting that the need                      survey design, directionality of any association
                                    component was more likely to predict consulta-                      between predisposing, enabling and need factors

266                                                                                  VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
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Table 5. Incidence risk ratios * (95% confidence intervals) from the Poisson regression models of the total number of GP visits

    Characteristics                                            Model 1a                Model 2b               Model 3b                Model 4d           Model 5e
    Predisposing
    Gender
    Females                                                1.14 (1.06–1.23)        1.23 (1.13–1.33)        1.09 (1.01–1.18)        1.12 (1.03–1.22)   1.13 (1.03–1.24)
    Males                                                        1.00                    1.00                    1.00                    1.00               1.00
    Age group (years)
    16–24                                                                          0.38 (0.33–0.45)                                                   0.47 (0.38–0.58)
    25–34                                                                          0.51 (0.43–0.61)                                                   0.63 (0.50–0.79)
    35–44                                                                          0.56 (0.48–0.66)                                                   0.71 (0.60–0.84)
    45–54                                                                          0.70 (0.57–0.87)                                                   0.95 (0.73–1.24)
    55–64                                                                          0.73 (0.64–0.83)                                                   0.85 (0.74–0.97)
    65+                                                                                  1.00                                                               1.00
    Marital status
    Married                                                                        0.87 (0.79–0.96)                                                   0.95 (0.85–1.07)
    Unmarried/never married                                                              1.00                                                               1.00
    Ethnicity of patients
    Maori                                                                          1.05 (0.83–1.32)                                                   1.05 (0.80–1.38)
    Pacific                                                                        0.95 (0.77–1.18)                                                   0.92 (0.76–1.13)
    Asian                                                                          0.71 (0.54–0.94)                                                   0.68 (0.51–0.89)
    Others                                                                         0.81 (0.70–0.94)                                                   0.76 (0.64–0.89)
    NZ European                                                                          1.00                                                                1.00
    NZDep 2001 quintile
    1                                                                              0.96 (0.83–1.10)                                                   1.13 (0.98–1.29)
    2                                                                              1.01 (0.87–1.17)                                                   1.09 (0.95–1.26)
    3                                                                              1.15 (0.97–1.37)                                                   1.23 (1.02–1.48)
    4                                                                              1.16 (0.99–1.37)                                                   1.22 (1.05–1.41)
    5                                                                                    1.00                                                               1.00
    Enabling resources
    Community Service Card (CSC)
    Yes                                                                                                    1.49 (1.36–1.63)                           1.39 (1.20–1.60)
    No                                                                                                           1.00                                       1.00
    High Use Health Card (HUHC)
    Yes                                                                                                    2.64 (2.29–3.05)                           2.33 (1.93–2.82)
    No                                                                                                           1.00                                       1.00
    Need component–practitioner perception
    Urgency of the visit
    ASAP                                                                                                                           0.95 (0.72–1.25)   1.03 (0.74–1.41)
    Today                                                                                                                          1.27 (1.03–1.56)   1.34 (1.05–1.70)
    This week                                                                                                                      1.22 (1.01–1.47)   1.15 (0.93–1.43)
    This month                                                                                                                           1.00               1.00
    Severity of the problem
    Life-threatening                                                                                                               1.84 (1.25–2.70)   1.33 (1.04–1.71)
    Intermediate                                                                                                                   1.22 (1.10–1.34)   1.12 (1.00–1.26)
    Self-limiting                                                                                                                        1.00                1.00

Source: National Primary Medical Care Survey, 2000

*    Incidence risk ratio measures the expected change in the dependent variable as a result of a one-unit change in the predictor variable.

a    Model 1: Gross model.
b    Model 2: Adjusted for age, marital status, ethnicity of patients and NZDep (predisposing characteristics).
c    Model 3: Adjusted for Community Service Card (CSC) and High Use Health Card (HUHC) (enabling resources).
d    Model 4: Adjusted for urgency of visit and severity of the problem (need factors).
e    Model 5: Adjusted for all the predisposing, enabling, and need factors.

VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE                                                                                                 267
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Table 6. Incidence risk ratios* (significance level) from the Poisson regression models of                  and use of primary health services cannot be
the total number of GP visits, separate models for men and women†                                           inferred from our findings. We anticipate that
    Characteristics                                         Men                        Women                future data collection through a longitudinal
    Predisposing                                                                                            project will offer the opportunity to identify
    Age group (years)                                                                                       causal links between health services use and vari-
    16–24                                            0.41 (0.31–0.53)             0.50 (0.38–0.66)          ous predisposing, enabling and need factors.
    25–34                                            0.52 (0.40–0.69)             0.67 (0.52–0.88)
                                                                                                            Third, NatMedCa was a practitioner-based, rather
    35–44                                            0.66 (0.48–0.91)             0.73 (0.59–0.92)
                                                                                                            than a population-based, survey. The data refer to
    45–54                                            0.92 (0.65–1.29)             0.96 (0.68–1.38)
                                                                                                            the actual work of GPs rather than to population
    55–64                                            0.83 (0.68–1.01)             0.85 (0.71–1.02)
                                                                                                            utilisation or to the needs of different popula-
    65+                                                     1.00                         1.00               tions. As a visits-based study, NatMedCa over-
    Marital status                                                                                          represents frequent users. For this reason care
    Married                                          0.91 (0.77–1.08)              0.95 (0.82–1.10)         must be exercised when generalising results to
    Unmarried/never married                                 1.00                         1.00               the general population: the results of this study
    Ethnicity of patients                                                                                   apply to users of primary health care services
    Maori                                            1.39 (0.76–2.55)             0.89 (0.76–1.04)          rather than to the general population.
    Pacific                                           1.05 (0.73–1.51)            0.85 (0.69–1.06)
    Asian                                             0.78 (0.55–1.10)            0.61 (0.43–0.85)          Fourth, we did not control for the health status
    Others                                           0.75 (0.58–0.96)             0.76 (0.62–0.94)          of the patients and this may have impacted our
    NZ European                                             1.00                         1.00               results.
    NZDep 2001 quintile
                                                                                                            Fifth, although we have adjusted for many
    1                                                1.07 (0.83–1.39)              1.15 (0.99–1.35)
                                                                                                            confounding variables, it is possible that the dif-
    2                                                1.21 (0.93–1.58)              1.02 (0.87–1.19)
                                                                                                            ferences we found in the visits to the GP could
    3                                                1.34 (0.87–2.07)              1.16 (0.99–1.36)
                                                                                                            be the result of other factors associated with pri-
    4                                                 1.18 (0.94–1.49)            1.23 (1.02–1.48)          mary care that we did not measure. For example,
    5                                                       1.00                         1.00               studies have shown the effects of gender concord-
    Enabling resources                                                                                      ance (i.e. similarity in gender of physician and
    Community Service Card (CSC)                                                                            patient) and ethnic concordance (i.e. similarity in
    Yes                                               1.36 (1.11–1.67)             1.37 (1.14–1.65)         ethnicity of physician and patient) on aspects of
    No                                                      1.00                         1.00               health care delivery.41-46
    High Use Health Card (HUHC)
    Yes                                              2.63 (2.09–3.31)             2.22 (1.69–2.92)          Conclusion
    No                                                      1.00                         1.00
    Need component–practitioner perception
                                                                                                            Notwithstanding these limitations, the study
                                                                                                            yields intriguing results. We found an inde-
    Urgency of the visit
                                                                                                            pendent and significant effect of gender on the
    ASAP                                              1.13 (0.78–1.65)            0.98 (0.65–1.49)
                                                                                                            utilisation of NZ GP services. This study found
    Today                                             1.27 (0.97–1.65)            1.37 (0.99–1.90)
                                                                                                            significant female excess in utilisation of GP
    This week                                         1.14 (0.93–1.40)            1.16 (0.86–1.58)
                                                                                                            services even after excluding gynaecological and
    This month                                              1.00                         1.00               obstetrical conditions and across all age groups.
    Severity of the problem                                                                                 We also found the differential effects of ethnic-
    Life-threatening                                 1.29 (0.88–1.90)             1.39 (1.00–1.94)          ity and need (severity of a problem) on use of
    Intermediate                                      1.14 (0.95–1.38)             1.10 (0.95–1.28)         GP services for men and women. Asian women
    Self-limiting                                           1.00                         1.00               were significantly less likely to visit a GP than
Source: National Primary Medical Care Survey, 2000
                                                                                                            European women, and women visiting GPs were
                                                                                                            more likely to have reported ‘life-threatening’
*       Incidence risk ratio measures the expected change in the dependent variable as a result of a one-
        unit change in the predictor variable.
                                                                                                            problems as compared to ‘self-limiting’ problems.
                                                                                                            However, ethnicity and the severity of a problem
†       Adjusted for all the predisposing, enabling, and need factors.
                                                                                                            did not predict consultation behaviour in men.

268                                                                                     VOLUME 1 • NUMBER 4 • DECEMBER 2009 J OURNAL OF PRIMARY HEALTH CARE
ORIGINAL SCIENTIFIC PAPErS
                                                                                                                                quantitative research

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