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Research

Impact of GP gatekeeping on quality of care, and health outcomes, use, and expenditure: a systematic review

Poompong Sripa, Benedict Hayhoe, Priya Garg, Azeem Majeed and Geva Greenfield
British Journal of General Practice 2019; 69 (682): e294-e303. DOI: https://doi.org/10.3399/bjgp19X702209
Poompong Sripa
Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK; Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
Roles: Junior doctor and visiting researcher
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Benedict Hayhoe
Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK.
Roles: Clinical lecturer in primary care
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Priya Garg
Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
Roles: Former medical student
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Azeem Majeed
Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK.
Roles: Professor of primary care
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Geva Greenfield
Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK.
Roles: Research fellow in public heath
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Abstract

Background GPs often act as gatekeepers, authorising patients’ access to specialty care. Gatekeeping is frequently perceived as lowering health service use and health expenditure. However, there is little evidence suggesting that gatekeeping is more beneficial than direct access in terms of patient- and health-related outcomes.

Aim To establish the impact of GP gatekeeping on quality of care, health use and expenditure, and health outcomes and patient satisfaction.

Design and setting A systematic review.

Method The databases MEDLINE, PreMEDLINE, Embase, and the Cochrane Library were searched for relevant articles using a search strategy. Two authors independently screened search results and assessed the quality of studies.

Results Electronic searches identified 4899 studies (after removing duplicates), of which 25 met the inclusion criteria. Gatekeeping was associated with better quality of care and appropriate referral for further hospital visits and investigation. However, one study reported unfavourable outcomes for patients with cancer under gatekeeping, and some concerns were raised about the accuracy of diagnoses made by gatekeepers. Gatekeeping resulted in fewer hospitalisations and use of specialist care, but inevitably was associated with more primary care visits. Patients were less satisfied with gatekeeping than direct-access systems.

Conclusion Gatekeeping was associated with lower healthcare use and expenditure, and better quality of care, but with lower patient satisfaction. Survival rate of patients with cancer in gatekeeping schemes was significantly lower than those in direct access, although primary care gatekeeping was not otherwise associated with delayed patient referral. The long-term outcomes of gatekeeping arrangements should be carefully studied before devising new gatekeeping policies.

  • gatekeeping
  • healthcare expenditure
  • healthcare use
  • patient care
  • primary care
  • referral and consultation

INTRODUCTION

Gatekeeping in health care is a response to a shortage of specialists and a need to control healthcare expenditure.1 In gatekeeping systems, patients are required to visit a GP or primary care physician to authorise access to specialty care. However, the effectiveness of gatekeeping in controlling expenditure remains unclear. On an individual patient level, one study of private health insurance found that mean annual total health expenditure was lower for patients with health insurance plans that required primary care gatekeeping to authorise specialist referrals than for those with an indemnity (non-gatekeeping) plan.2 However, the percentage of gross domestic product spent on health does not differ significantly between countries with and without gatekeeping models of health care.3

A previous review, capturing literature up to January 2010, found that gatekeeping was related to lower health service use and lower health expenditure. However, there was great variability in the magnitude and direction of the differences, and the impact on health-related and patient-related outcomes was still inconclusive.4 The question remains whether gatekeeping is linked to any adverse health effects. A few studies have suggested that gatekeeping causes delayed diagnoses of cancer.5,6 In the UK — a healthcare system with strong gatekeeping — poor survival rates for breast, colorectal, and lung cancers compared with other European countries have been partly attributed to delayed diagnoses.6

Considering the potential impact of gatekeeping policy on patients and healthcare systems,3,5 there is a need for an updated systematic review to support healthcare policy. The aim of this study was to identify the effects of primary care physician gatekeeping on quality of care, health outcomes, use and expenditure, and physician and patient attitudes.

METHOD

A systematic review was conducted according to recommendations in the Cochrane Handbook for Systematic Reviews of Interventions,7 and reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement.8

Search strategy

Following scoping searches, the strategy used in a previous systematic review4 was modified to include the term ‘referral’ to increase sensitivity to studies involving gatekeeping. Terms relating to ‘primary care’ were included to limit the search to gatekeeping in this setting. ‘Quality of care’, ‘health expenditure’, and ‘health outcomes‘ and ‘patient outcomes’ were included to increase specificity.

How this fits in

Previous work has suggested an association between gatekeeping and lower healthcare use and expenditure, with inconclusive evidence for the impact on health-related and patient-related outcomes. Particular concern exists that gatekeeping causes delayed cancer diagnosis. In this systematic review, gatekeeping was associated with lower healthcare use and expenditure, and better quality of care, but with lower patient satisfaction. Primary care gatekeeping was not otherwise associated with delayed patient referral.

The research databases MEDLINE, PreMEDLINE, Embase, and the Cochrane Library were searched for relevant studies. Preliminary searches showed that gatekeeping was rarely the main objective of a study. Therefore, a comprehensive search strategy was used from the databases’ respective inception dates up to September 2017. The MEDLINE search strategy is available from the authors on request.

Eligibility criteria

The eligibility criteria were discussed and agreed by all authors (Box 1). Gatekeeping was previously defined as a requirement to visit a primary care physician, family medicine doctor, GP, general internist, or general paediatrician in a primary care setting,4 so this definition was adopted. Studies relating to patient referrals in a primary care setting were included. Gatekeeping by a primary care physician, as an intervention, was required to be implemented in patient referrals. Studies considered were systematic reviews, experimental studies, and observational studies that included outcomes of quality of care, healthcare expenditure and use, health-related and patient-related outcomes including health-related quality of life, mortality, morbidity, and patient and clinician attitudes. Studies that were published in languages other than English and those for which the abstract or full-text could not be retrieved were excluded.

Box 1.

Inclusion criteria for studies in the systematic review

Gatekeeping conducted in a primary care setting by primary care physicians including a primary care physician, family medicine doctor, GP, general internist, or general paediatrician

Outcomes of gatekeeping involve one or more of:

  • quality of care;

  • healthcare expenditure and use; and

  • health-related and patient-related outcomes.

Study selection

Two of the authors independently screened titles and abstracts to identify eligible studies and conducted full-text screening for eligible studies. Discrepancies were solved through discussions with other authors.

Data collection, extraction, and assessment of study quality

Two authors independently extracted the following data from the studies: study design, setting, gatekeeping arrangements, population, duration, comparison, and outcomes of studies. The extracted information was collated in a structured form, and included information reported on the gatekeeping arrangement, categories of outcomes, country, study design, population, intervention, age group, conditions, sample size, comparison (if possible), and outcomes (quality of care, health expenditure, and health-related/patient-related outcomes). Extraction forms completed by the two authors were compared, and discrepancies were discussed with the other authors and followed up with reference to the original article.

Risk of bias assessment

The methodological quality of the studies was assessed independently by two authors following the Effective Practice for Organisation of Care recommendations for review authors.9 An appropriate assessment tool relevant for each study design was chosen: the AMSTAR checklist for quality assessment of systematic reviews and meta-analyses,10 the Cochrane Risk of Bias Tool for Randomised Controlled Trials,7 and the National Institute of Health and National Heart, Lung, and Blood Institute Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies.11 The quality of each study was based on allocation, outcome assessment, data sources, and risk of contamination and bias. As quality assessment tools specific to each study design were used, the quality of studies with different designs was not compared.

Data synthesis

Owing to the variety of measured outcomes and methodological approaches in the included studies, it was not possible to conduct a meta-analysis, and therefore a descriptive narrative synthesis was used.12

RESULTS

Study selection

Electronic database searches yielded 8734 articles, of which 3835 were duplicates. Following title and abstract screening, 80 full-text studies were obtained. A total of 55 studies were excluded because they did not meet eligibility criteria, leaving 25 studies for analysis (Figure 1).2,4,13–35

Figure 1.
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Figure 1.

PRIMSA flow diagram for the search and selection process applied during the overview.

Study characteristics

Twenty-one observational studies, two controlled before-and-after studies, one systematic review, and one randomised controlled trial were included in the review; there were 17 studies from the US and eight from Europe, respectively (Table 1).2,4,13–35 Most of the studies included adult populations, and four included only children (<18 years old). Various health conditions were considered in the included studies. Mostly, the included studies examined the effects of gatekeeping interventions, including implementing or switching to a gatekeeping system,17,18,22 access to cancer screening services,13,20,23 emergency departments,35 and surgical departments.14,16

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Table 1.

Characteristics of included studies

Risk of bias assessment

Although most observational studies were of fair quality,2,13,19–25,27,30,31,34 experimental studies were rated at high risk of bias on the selective reporting domains.17,18,32 One systematic review scored 7 out of 11 according to AMSTAR recommendations.4 The AMSTAR checklist for methodological assessment of systematic reviews reflects bias.36 Another ecological study was not assessed because of its research design.15 Quality assessment for included studies is available from the authors on request.

Impact of gatekeeping on various indicators

Extracted outcomes from the studies are summarised in Table 2.

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Table 2.

Extracted outcomes from included studies

Quality of care

Five studies reported the impact of gatekeeping on outcome measures. In the US, patients were more likely to receive cardiac catheterisations (33% versus 19%; P<0.01) where there was primary care gatekeeping in place.31 Female patients enrolled in healthcare plans with gatekeeping were reported as having significantly more mammography screenings, clinical breast examinations, and cervical screening.13,23 They were reported as receiving more mammography in total (P<0.001; adjusted OR = 1.18; 95% CI = 1.03 to 1.36).20 However, two studies in the UK and the US indicated that primary care gatekeepers were correct in only 31%16 and 43.6%14 of diagnoses.

Health outcomes

Regarding cancer care, an ecological study reported that relative 1-year survival was higher in a direct-access system than in a gatekeeping system among patients with cancer.15 However, a pilot study included in a previous review4 demonstrated no difference in melanoma outcomes between gatekeeping and direct access, although patients in the direct-access group underwent diagnostic biopsy sooner than those in the gatekeeping group.

Healthcare use

Ten studies found effects of gatekeeping on healthcare use. The previous systematic review suggested that gatekeeping resulted in less hospitalisation and specialist use.4 In the US, a longitudinal study reported a significant reduction in emergency visits of patients following introduction of a gatekeeping system.35 Additionally, one randomised controlled trial reported that patients subject to gatekeeping decreased their healthcare use by 0.57 specialty visits and 0.14 hospitalisations per year more than patients with direct access.32

Patients made more visits to their primary care physician when gatekeeping was in place (P = 0.05).18 One cohort study reported that subspecialist visits declined in children with the gatekeeping (from 1.6/year to 0.5/year; P<0.001).22 However, one retrospective study showed that patients with healthcare plans requiring gatekeeper authorisation had 33% more total visits (primary care physician and specialist) than adults with a direct access plan.24

Health expenditure

Nine studies investigated the impact of gatekeeping on health expenditure. A previous systematic review showed health expenditure was 6–80% lower under gatekeeping than direct-access schemes.4 Two other studies also reported reduced healthcare expenditure where gatekeeping was in place,28 with lower costs than fee-for-service systems.29

A cross-sectional study reported that total mean expenditure was US$1835 for patients in a gatekeeping plan versus US$1959 for direct-access patients, and the gatekeeping patients paid US$110 less out-of-pocket.2 Moreover, the total cost difference per patient was −€9.65 (95% CI = −11.64 to −7.67), indicating lower costs for the gatekeeping model.25 However, a cross-sectional study in the US showed adults with a gatekeeping plan had 29% higher total medical expenditure.19 Another study suggested that total physician expenditure in a gatekeeping plan was 4% higher (P<0.05), especially for primary care physicians’ services (P<0.001).30

Healthcare expenditure for children was higher for those enrolled in a gatekeeping plan.27 However, if all enrolees had similar characteristics, total mean expenditure per capita would have been 4% lower for children with a gatekeeping plan.27 Similarly, another study in the US found total expenditure among children who switched to a gatekeeping plan from a direct-access plan decreased from US$486 to US$180.22

Physician attitudes

One cross-sectional study reported that primary care physicians perceived that gatekeeping had a negative impact on quality of care, and a positive impact on preventive care and knowledge of patients’ overall care.33 Primary care physicians reported that gatekeeping was significantly better at cost control than direct access. However, they believed that gatekeeping had a negative effect on the appropriate use of hospitalisation, laboratory tests, specialists, and medication choice.33

Patient satisfaction

Gatekeeping was associated with reduced patient satisfaction compared with a direct-access system.4 One study reported that patients were more satisfied with primary care physicians in a direct-access system than in a gatekeeping system.34 Similarly, a European study found that countries with more directly accessible providers showed greater patient satisfaction with GP services.26

DISCUSSION

Summary

Included studies suggest an association between gatekeeping and better quality of care, especially in terms of preventive care, and appropriate referral for specialty care and investigation. However, one study reported unfavourable outcomes of patients with cancer under gatekeeping,15 and some raised concerns about the ability of GP gatekeepers to provide a correct diagnosis.14,16 Gatekeeping resulted in fewer hospitalisations4,29,32 and lower specialist use,4,22,31 but in more primary care visits.24 Whereas some studies show that gatekeeping has lower healthcare use and expenditure,2,4,22,25,27–29,35 others suggest that gatekeeping has higher ambulatory care and outpatient expenditure.2,27 Primary care clinicians have conflicting views on gatekeeping,33 whereas patients are often less satisfied with gatekeeping schemes, preferring direct access to specialists.4,26,34

Strengths and limitations

This study aimed to summarise the current literature on an important mechanism shaping the functions of primary and secondary care, and the divide between them. It focused specifically on the gatekeeping function of primary care. The authors acknowledge that even this term has different meanings in different countries, under different healthcare models, and with different health insurance schemes, which makes comparison between studies challenging. Most of the studies included in this review are based in the US and so reflect the American healthcare system.

Although most included studies focused on gatekeeping interventions and impact on health outcomes, there may be some effects from other confounders such as cancer screening programmes, socioeconomic statuses, employments, and types of insurances that this study was unable to identify. Furthermore, the scarcity of randomised controlled trials make it challenging to attribute the observed differences merely to gatekeeping, because many other factors, such as different payment arrangements, could have affected the outcomes.

Most studies report process measures such as use, screening, or number of visits, with few reporting on patient-related and health-related outcomes, making it difficult to draw firm conclusions about the impact of gatekeeping on these areas. Finally, the findings are described in separate categories, derived from the included studies. It is likely that there is considerable inter-relation between these categories, with significant overlap, for example, between ‘quality of care’ and ‘patient experience’. Similarly, there is likely to be a complex association between patient satisfaction, gatekeeping, and healthcare use. However, the nature of the studies as reported meant that it was not possible to gain a clearer understanding of these complexities.

Comparison with existing literature

Some authors have challenged the notion of gatekeeping as an effective cost-containment system.3,27 The findings show that gatekeeping often results in lower health expenditure and health use for health services because it controls costs associated with unnecessary expensive specialist care and resource use.37

Patients are often less satisfied with gatekeeping schemes and prefer direct access to specialists, because they believe that specialists have better facilities, and because they wish to see a specialist quicker.38,39 To improve patient satisfaction, health systems should enlarge primary care capacity and decrease the gap between primary and secondary care sectors, promoting the role of primary care professionals as ‘healthcare coordinators’ between primary and secondary care.38,39

Patients in gatekeeping schemes are more likely to have preventive care in the form of cancer screening including cervical screening and mammography. However, delayed diagnosis caused by gatekeeping is believed to be one of the factors causing lower cancer survival rates in the UK. In England, nearly three-quarters of patients with cancer who visited their GPs in 200240 and 201441 were referred to a specialist after only one or two consultations, and about 60% of all referred patients saw a specialist within 2 weeks.40,41 This suggests that, at least in the UK, delayed diagnosis of cancer is not caused solely by gatekeeping, but by other healthcare system factors, patient behaviour, and healthcare provider factors.15,42–46

Implications for policy and research

Caution should be exercised in interpreting these findings to the policy context. Policymakers eager to reduce costs and use may conclude that reduction in specialist healthcare use and expenditure makes gatekeeping a favourable system. However, conclusions for policy can be drawn only when we are clear about the long-term consequences of reduced healthcare use and expenditure. Short-term reductions in specialist healthcare use may delay care, leading to worse patient outcomes.

The intended and unintended consequences of setting up gatekeeping, relaxation of gatekeeping, and use of gatekeeping should be considered in services such as investigations, and preventive and supportive services. For example, relaxation of gatekeeping may be a good strategy to improve health outcomes and patient satisfaction, but can potentially increase waiting time to secondary care.40,41

Difficulties in comparing studies and healthcare systems make it hard to draw firm conclusions from these results about the impact of gatekeeping on the outcomes examined. In particular, the long-term impact on quality of care and health outcomes remains unclear. Further studies are required to understand the impact of gatekeeping arrangements on these factors.

Continued financial and logistical challenges for healthcare systems mean that a model with potential to reduce healthcare use and expenditure while potentially improving quality of care is highly attractive. Consequently, primary care gatekeeping remains embedded in the culture of health care in many countries, including the UK. However, as this review demonstrates, the evidence of its impact on healthcare systems and patients remains far from clear and is complicated by the heterogeneity of systems and studies. Although gatekeeping may be associated with a reduction in specialist healthcare use and resulting financial benefits, a possible association with delayed diagnosis, particularly in the context of cancer care, is of significant concern. Although further research into longer-term patient- and health-related outcomes of gatekeeping would be of value, policymakers should perhaps focus more on collaborative efforts in primary and secondary care, aiming for a more unified approach to patient care.

Acknowledgments

The authors wish to thank Rebecca Jones, a specialist librarian, for her support in setting up the search strategy and retrieving the search results.

Notes

Funding

This research was supported by the National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care Northwest London (CLAHRC NWL). The views expressed in this article are those of the authors and not necessarily those of the NHS, the NIHR, or the Department of Health and Social Care. Poompong Sripa was supported by the Prince Mahidol Award Youth Programme. The funders have no role in shaping or drafting the manuscript.

Ethical approval

Ethical approval was not required for this study.

Provenance

Freely submitted; externally peer reviewed.

Competing interests

The authors have declared no competing interests.

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  • Received June 27, 2018.
  • Revision requested July 26, 2018.
  • Accepted August 28, 2018.
  • © British Journal of General Practice 2019

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British Journal of General Practice: 69 (682)
British Journal of General Practice
Vol. 69, Issue 682
May 2019
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Impact of GP gatekeeping on quality of care, and health outcomes, use, and expenditure: a systematic review
Poompong Sripa, Benedict Hayhoe, Priya Garg, Azeem Majeed, Geva Greenfield
British Journal of General Practice 2019; 69 (682): e294-e303. DOI: 10.3399/bjgp19X702209

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Impact of GP gatekeeping on quality of care, and health outcomes, use, and expenditure: a systematic review
Poompong Sripa, Benedict Hayhoe, Priya Garg, Azeem Majeed, Geva Greenfield
British Journal of General Practice 2019; 69 (682): e294-e303. DOI: 10.3399/bjgp19X702209
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Keywords

  • gatekeeping
  • healthcare expenditure
  • healthcare use
  • patient care
  • primary care
  • referral and consultation

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