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Davies F, Edwards M, Price D, Anderson P, Carson-Stevens A, Choudhry M, Cooke M, Dale J, Donaldson L, Evans BA, Harrington B, Harris S, Hepburn J, Hibbert P, Hughes T, Hussain F, Islam S, Pockett R, Porter A, Siriwardena AN, Snooks H, Watkins A, Edwards A, Cooper A. Evaluation of different models of general practitioners working in or alongside emergency departments: a mixed-methods realist evaluation. HEALTH AND SOCIAL CARE DELIVERY RESEARCH 2024; 12:1-152. [PMID: 38687611 DOI: 10.3310/jwqz5348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Background Emergency healthcare services are under intense pressure to meet increasing patient demands. Many patients presenting to emergency departments could be managed by general practitioners in general practitioner-emergency department service models. Objectives To evaluate the effectiveness, safety, patient experience and system implications of the different general practitioner-emergency department models. Design Mixed-methods realist evaluation. Methods Phase 1 (2017-8), to understand current practice: rapid realist literature review, national survey and follow-up key informant interviews, national stakeholder event and safety data analysis. Phase 2 (2018-21), to collect and analyse qualitative (observations, interviews) and quantitative data (time series analysis); cost-consequences analysis of routine data; and case site data for 'marker condition' analysis from a purposive sample of 13 case sites in England and Wales. Phase 3 (2021-2), to conduct mixed-methods analysis for programme theory and toolkit development. Results General practitioners commonly work in emergency departments, but delivery models vary widely in terms of the scope of the general practitioner role and the scale of the general practitioner service. We developed a taxonomy to describe general practitioner-emergency department service models (Integrated with the emergency department service, Parallel within the emergency department, Outside the emergency department on the hospital site) and present a programme theory as principal output of the study to describe how these service models were observed to operate. Routine data were of variable quality, limiting our analysis. Time series analysis demonstrated trends across intervention sites for: increased time spent in the emergency department; increased emergency department attendances and reattendances; and mixed results for hospital admissions. Evidence on patient experience was limited but broadly supportive; we identified department-level processes to optimise the safety of general practitioner-emergency department models. Limitations The quality, heterogeneity and extent of routine emergency department data collection during the study period limited the conclusions. Recruitment was limited by criteria for case sites (time series requirements) and individual patients (with 'marker conditions'). Pandemic and other pressures limited data collection for marker condition analysis. Data collected and analysed were pre pandemic; new approaches such as 'telephone first' and their relevance to our findings remains unexplored. Conclusion Findings suggest that general practitioner-emergency department service models do not meet the aim of reducing the overall emergency department waiting times and improving patient flow with limited evidence of cost savings. Qualitative data indicated that general practitioners were often valued as members of the wider emergency department team. We have developed a toolkit, based on our findings, to provide guidance for implementing and delivering general practitioner-emergency department services. Future work The emergency care data set has since been introduced across England to help standardise data collection to facilitate further research. We would advocate the systematic capture of patient experience measures and patient-reported outcome measures as part of routine care. More could be done to support the development of the general practitioner in emergency department role, including a core set of competencies and governance structure, to reflect the different general practitioner-emergency department models and to evaluate the effectiveness and cost effectiveness to guide future policy. Study registration This study is registered as PROSPERO CRD42017069741. Funding This award was funded by the National Institute for Health and Care Research (NIHR) Health and Social Care Delivery Research programme (NIHR award ref: 15/145/04) and is published in full in Health and Social Care Delivery Research; Vol. 12, No. 10. See the NIHR Funding and Awards website for further award information.
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Affiliation(s)
- Freya Davies
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Michelle Edwards
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Delyth Price
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Pippa Anderson
- Bangor Institute for Health and Medical Research, Bangor University, Wales, UK
| | | | - Mazhar Choudhry
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Matthew Cooke
- Professor of Clinical Systems Design, Warwick Medical School, Warwick, UK
| | - Jeremy Dale
- Professor of Clinical Systems Design, Warwick Medical School, Warwick, UK
| | | | - Bridie Angela Evans
- PRIME Centre Wales, Swansea University Medical School, Swansea University, Swansea, UK
| | | | - Shaun Harris
- Swansea Centre for Health Economics, School of Health and Social Care, Swansea University, Swansea, UK
| | - Julie Hepburn
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | | | | | - Faris Hussain
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Saiful Islam
- Swansea University Medical School, Swansea University, Swansea, UK
| | - Rhys Pockett
- Swansea Centre for Health Economics, School of Health and Social Care, Swansea University, Swansea, UK
| | - Alison Porter
- PRIME Centre Wales, Swansea University Medical School, Swansea University, Swansea, UK
| | | | - Helen Snooks
- PRIME Centre Wales, Swansea University Medical School, Swansea University, Swansea, UK
| | - Alan Watkins
- PRIME Centre Wales, Swansea University Medical School, Swansea University, Swansea, UK
| | - Adrian Edwards
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
| | - Alison Cooper
- PRIME Centre Wales, School of Medicine, Cardiff University, Cardiff, UK
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Rebolho RC, Raupp FM. Implementation costs of telephone nurse triage service. CAD SAUDE PUBLICA 2023; 39:e00095522. [PMID: 37075414 DOI: 10.1590/0102-311xen095522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 01/25/2023] [Indexed: 04/21/2023] Open
Abstract
Telephone nurse triage services are becoming increasingly common in healthcare systems worldwide. Florianópolis (Santa Catarina State, Brazil) is the first municipality in the country to provide this service in its public health system. This study adopted a quantitative, descriptive, and analytical methodology to evaluate the impact of this program on overall costs of the public health system. The research examined all 33,869 calls received by the telephone triage service from March 16 to October 31 in 2020, and calculated the program costs during the period. Avoided cost were calculated by the difference between estimated consultation costs considering patient-stated first alternative and the program recommendation after triage. Analyzing only the costs for the municipality of Florianópolis, the program's costs exceeded avoided costs by almost BRL 2.5 million during the period. By expanding the analysis to include costs of emergency department consultation - not administered by the municipality - based on data from previous research, we found that the program spares BRL 34.59 per call, a 21% cost reduction for the health system. Considering the preliminary results of the study and its limitations, it is understood that the service of telephone nurse triage can reduce costs in the healthcare system.
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Dundar C, Yaylaoglu SD. Non-emergent care visits in a turkish tertiary care emergency department after 2008 health policy changes: review and analysis. Arch Public Health 2022; 80:31. [PMID: 35039087 PMCID: PMC8762921 DOI: 10.1186/s13690-022-00787-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 01/09/2022] [Indexed: 11/21/2022] Open
Abstract
Background The Turkish government liberalized national healthcare policies in 2008 enabling Turkish citizens to seek general care in hospital emergency departments (ED). The number of ED visits has exceeded the total population every year for the last ten years. To explain this phenomenon and to identify trends and risk factors for non-emergent visits, we retrospectively reviewed the ED records of a tertiary hospital and the Turkish Ministry of Health bulletin. Methods This retrospective record-based study was conducted at a tertiary hospital in Samsun province of Turkey. A total of 87,528 records of adult patients who visited the ED between January 1 and December 31, 2017, were included in this study. We evaluated the pattern of ED use for non-emergent patients by age, gender, nationality, time of visit, means of arrival, ICD (International Classification of Diseases) diagnostic codes, triage codes, number of repeated and out-of-hours visits. We used the Turkish Ministry of Health statistics bulletins to compare the number of ED visits across the country by year. Results The non-emergent visit rate in ED was found 9.9%. The rate of non-emergent ED visits was significantly higher in the 18-44 age group, in the female gender, and in those who arrived at the ED without an ambulance. The number of non-emergent visits was very similar between weekends and weekdays but was significantly higher in working hours on weekdays than out-of-hours (p<0.001). The most frequent diagnostic code was “Pain, unspecified” (R52) and the rate of repeat visits was 14.8% of non-emergent ED visits. According to binary logistic analysis, non-emergency visits were associated with 18-44 age group (OR = 2.75), female gender (OR = 1.11) and non-ambulance transportation (OR = 9.86). Conclusions Our results showed that the 18-44 age group and female gender seek care in the ED for non-emergent problems more than the other parts of the population. The numbers of ED visits in the last decade continued to increase regardless of population growth. The health policy changes may have facilitated access to rapid physical and laboratory examination but also an exacerbation of the free-rider problem in ED services.
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Affiliation(s)
- Cihad Dundar
- Department of Public Health, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.
| | - Seydanur Dal Yaylaoglu
- Department of Public Health, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey
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Abstract
With health care costs continuing to rise, much attention has been focused on appropriate emergency department (ED) utilization, and nationwide interventions have been developed to support reduction in health care costs and ED use including primary care, community, and home health models. The following is a review of the current state of the evidence regarding patients receiving home health care nursing (HHN) services and impacts on ED utilization. There are significant gaps in the literature regarding the transition from home to ED in patients receiving HHN services; what tools are utilized by home health nurses for triage of patients at home in order to recommend transfer to the ED or other care sources; and what measures are in place for HHN patients regarding variables that are considered to have a higher impact on ED utilization. There is a substantial lack of evidence about whether the effects of HHN services have any relation to, in particular decreasing, ED utilization. There is increasing evidence of the impacts of nurse practitioner care within the community.
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Stiel S, Ewertowski H, Krause O, Schneider N. What do positive and negative experiences of patients, relatives, general practitioners, medical assistants, and nurses tell us about barriers and supporting factors in outpatient palliative care? A critical incident interview study. GERMAN MEDICAL SCIENCE : GMS E-JOURNAL 2020; 18:Doc08. [PMID: 33214790 PMCID: PMC7656812 DOI: 10.3205/000284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 05/06/2020] [Indexed: 11/30/2022]
Abstract
Background: The strengthening of the general practitioners’ (GPs’) role in palliative care (PC) has been identified as a top priority in order to improve PC in Germany. This study aims at exploring positive and negative experiences in PC in Germany from the perspectives of patients, relatives, and health care professionals in a primary care setting. Methods: Between March 2017 and August 2017, a total of 16 interviews with patients, relatives, GPs, medical assistants, and nurses were conducted. The Critical Incident Technique (CIT) was used to explore factors that influence excellent versus undesirable events in PC provision. Two researchers independently defined and counted critical incidents (CIs) from interview transcripts, performed a thematic analysis, and clustered the CIs into dimensions. Results: In summary, 16 interviews contained 280 CIs, divided into 130 positive and 150 negative CIs. The thematic analysis resulted in seven content domains, with each including positive and negative CIs, respectively: 1) way of care provision, 2) availability of care providers, structures, medication, and aids, 3) general formal conditions of care provision, 4) bureaucracy, 5) working practices in health care teams, 6) quality and outcome of care provision, and 7) communication. Conclusions: The results raise awareness for the aspects that lead to successful or undesirable PC experiences, observed from different perspectives. They open up the potential for primary PC improvement. Future research will facilitate development and implementation of more tailored interventions in order to improve generalists’ PC.
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Affiliation(s)
- Stephanie Stiel
- Institute for General Practice, Hannover Medical School, Hannover, Germany
| | - Helen Ewertowski
- Institute for General Practice, Hannover Medical School, Hannover, Germany
| | - Olaf Krause
- Institute for General Practice, Hannover Medical School, Hannover, Germany
| | - Nils Schneider
- Institute for General Practice, Hannover Medical School, Hannover, Germany
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Jones A, Bronskill SE, Schumacher C, Seow H, Feeny D, Costa AP. Effect of Access to After-Hours Primary Care on the Association Between Home Nursing Visits and Same-Day Emergency Department Use. Ann Fam Med 2020; 18:406-412. [PMID: 32928756 PMCID: PMC7489957 DOI: 10.1370/afm.2571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/29/2020] [Accepted: 02/05/2020] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Previous work has demonstrated that home care patients have an increased risk of visiting the emergency department after a home nursing visit on the same day. We investigated whether this association is modified by greater access to after-hours primary care. METHODS We conducted a population-based case-crossover study of home care patients in Ontario, Canada in 2014-2016. Emergency department visits after 5:00 pm were selected as case periods and matched, within the same patient, to control periods within the previous week. The association between home nursing visits and same-day emergency department visits was estimated with conditional logistic regression. Access to after-hours primary care, measured on the patient and practice level, was tested for effect modification using an interaction term approach. Analysis was performed separately for all emergency department visits and a less urgent subset not admitted to hospital. RESULTS A total of 11,840 patients contributed cases to the analysis. Patients with a history of after-hours primary care use had a smaller increased risk of a same-day after-hours emergency department visit (OR = 1.18; 95% CI, 1.06-1.30) compared with patients with no after-hours care (OR = 1.31; 95% CI, 1.25-1.39). The modifying effect was stronger among emergency department visits not admitted to hospital (OR = 1.11; 95% CI, 0.97-1.28 vs OR = 1.41; 95% CI, 1.31-1.51). CONCLUSION Greater access to after-hours primary care reduced the risk of less-urgent emergency department use associated with home nursing visits. These findings suggest increasing access to after-hours primary care could prevent some less-urgent emergency department visits.
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Affiliation(s)
- Aaron Jones
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Susan E Bronskill
- ICES, Toronto, Ontario, Canada.,Institute of Health Policy, Management & Evaluation, Dalla Lana School of Public Health, University of Toronto
| | - Connie Schumacher
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Hsien Seow
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.,Department of Oncology, McMaster University, Hamilton, Ontario, Canada
| | - David Feeny
- Department of Economics, McMaster University, Hamilton, Ontario, Canada
| | - Andrew P Costa
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.,Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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Blinkenberg J, Pahlavanyali S, Hetlevik Ø, Sandvik H, Hunskaar S. General practitioners' and out-of-hours doctors' role as gatekeeper in emergency admissions to somatic hospitals in Norway: registry-based observational study. BMC Health Serv Res 2019; 19:568. [PMID: 31412931 PMCID: PMC6693245 DOI: 10.1186/s12913-019-4419-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 08/09/2019] [Indexed: 12/11/2022] Open
Abstract
Background Primary care doctors have a gatekeeper function in many healthcare systems, and strategies to reduce emergency hospital admissions often focus on general practitioners’ (GPs’) and out-of-hours (OOH) doctors’ role. The aim of the present study was to investigate these doctors’ role in emergency admissions to somatic hospitals in the Norwegian public healthcare system, where GPs and OOH doctors have a distinct gatekeeper function. Methods A cross-sectional analysis was performed by linking data from the Norwegian Patient Registry (NPR) and the physicians’ claims database. The referring doctor was defined as the physician who had sent a claim for a consultation with the patient within 24 h prior to an emergency admission. If there was no claim registered prior to hospital arrival, the admission was defined as direct, representing admissions from ambulance services, referrals from nursing home doctors, and admissions initiated by in-hospital doctors. Results In 2014 there were 497,587 emergency admissions to somatic hospitals in Norway after excluding birth related conditions. Direct admissions were most frequent (43%), 31% were referred by OOH doctors, 25% were referred by GPs, whereas only 2% were referred from outpatient clinics or private specialists with public contract. Direct admissions were more common in central areas (52%), here GPs’ referrals constituted only 16%. The prehospital paths varied with the hospital discharge diagnosis. For anaemias, 46–49% were referred by GPs, for acute appendicitis and mental/alcohol related disorders 52 and 49% were referred by OOH doctors, respectively. For both malignant neoplasms and cardiac arrest 63% were direct admissions. Conclusions GPs or OOH doctors referred many emergencies to somatic hospitals, and for some clinical conditions GPs’ and OOH doctors’ gatekeeping role was substantial. However, a significant proportion of the emergency admissions was direct, and this reduces the impact of the GPs’ and OOH doctors’ gatekeeper roles, even in a strict gatekeeping system.
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Affiliation(s)
- Jesper Blinkenberg
- National Centre for Emergency Primary Health Care, NORCE Norwegian Research Centre, Kalfarveien 31, 5018, Bergen, Norway. .,Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018, Bergen, Norway.
| | - Sahar Pahlavanyali
- National Centre for Emergency Primary Health Care, NORCE Norwegian Research Centre, Kalfarveien 31, 5018, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018, Bergen, Norway
| | - Øystein Hetlevik
- Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018, Bergen, Norway
| | - Hogne Sandvik
- National Centre for Emergency Primary Health Care, NORCE Norwegian Research Centre, Kalfarveien 31, 5018, Bergen, Norway
| | - Steinar Hunskaar
- National Centre for Emergency Primary Health Care, NORCE Norwegian Research Centre, Kalfarveien 31, 5018, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018, Bergen, Norway
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Characteristics of Non-Emergent Visits in Emergency Departments: Profiles and Longitudinal Pattern Changes in Taiwan, 2000-2010. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16111999. [PMID: 31195627 PMCID: PMC6603954 DOI: 10.3390/ijerph16111999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/26/2019] [Accepted: 06/04/2019] [Indexed: 11/17/2022]
Abstract
An increasing number of emergency department (ED) visits have posed a challenge to health systems in many countries, but an understanding of non-emergent ED visits has remained limited and contentious. This retrospective study analyzed ED visits using three representative cohorts from routine data to explore the profiles and longitudinal pattern changes of non-emergent ED visits in Taiwan. Systematic-, personal-, and ED visit-level data were analyzed using a logistic regression model. Average marginal effects were calculated to compare the effects of each factor. The annual ED visit rate increased up to 261.3 per 1000 population in 2010, and a significant one-third of visits were considered as non-emergent. The rapidly growing utilization of ED visits underwent a watershed change after cost-sharing payments between patients and medical institutions were increased in 2005. In addition to cohort effects resulting from cost-sharing payment changes, all factors were significantly associated with non-emergent ED visits with different levels of impact. We concluded that non-emergent ED visits were associated with multifaceted factors, but the change to cost-sharing payment, being female, younger age, and geographical residence were the most predictive factors. This information would enhance the implementation of evidence-based strategies to optimize ED use.
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Cooper A, Davies F, Edwards M, Anderson P, Carson-Stevens A, Cooke MW, Donaldson L, Dale J, Evans BA, Hibbert PD, Hughes TC, Porter A, Rainer T, Siriwardena A, Snooks H, Edwards A. The impact of general practitioners working in or alongside emergency departments: a rapid realist review. BMJ Open 2019; 9:e024501. [PMID: 30975667 PMCID: PMC6500276 DOI: 10.1136/bmjopen-2018-024501] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 12/14/2018] [Accepted: 01/24/2019] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES Worldwide, emergency healthcare systems are under intense pressure from ever-increasing demand and evidence is urgently needed to understand how this can be safely managed. An estimated 10%-43% of emergency department patients could be treated by primary care services. In England, this has led to a policy proposal and £100 million of funding (US$130 million), for emergency departments to stream appropriate patients to a co-located primary care facility so they are 'free to care for the sickest patients'. However, the research evidence to support this initiative is weak. DESIGN Rapid realist literature review. SETTING Emergency departments. INCLUSION CRITERIA Articles describing general practitioners working in or alongside emergency departments. AIM To develop context-specific theories that explain how and why general practitioners working in or alongside emergency departments affect: patient flow; patient experience; patient safety and the wider healthcare system. RESULTS Ninety-six articles contributed data to theory development sourced from earlier systematic reviews, updated database searches (Medline, Embase, CINAHL, Cochrane DSR & CRCT, DARE, HTA Database, BSC, PsycINFO and SCOPUS) and citation tracking. We developed theories to explain: how staff interpret the streaming system; different roles general practitioners adopt in the emergency department setting (traditional, extended, gatekeeper or emergency clinician) and how these factors influence patient (experience and safety) and organisational (demand and cost-effectiveness) outcomes. CONCLUSIONS Multiple factors influence the effectiveness of emergency department streaming to general practitioners; caution is needed in embedding the policy until further research and evaluation are available. Service models that encourage the traditional general practitioner approach may have shorter process times for non-urgent patients; however, there is little evidence that this frees up emergency department staff to care for the sickest patients. Distinct primary care services offering increased patient choice may result in provider-induced demand. Economic evaluation and safety requires further research. PROSPERO REGISTRATION NUMBER CRD42017069741.
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Affiliation(s)
- Alison Cooper
- Division of Population Medicine, Cardiff University, Cardiff, UK
| | - Freya Davies
- Division of Population Medicine, Cardiff University, Cardiff, UK
| | - Michelle Edwards
- Division of Population Medicine, Cardiff University, Cardiff, UK
| | - Pippa Anderson
- Centre for Health Economics, Swansea University, Swansea, UK
| | | | | | - Liam Donaldson
- London School of Hygiene and Tropical Medicine, London, UK
| | - Jeremy Dale
- Warwick Medical School, University of Warwick, Coventry, UK
| | | | - Peter D Hibbert
- Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales, Australia
- University of South Australia Division of Health Sciences, Adelaide, South Australia, Australia
| | - Thomas C Hughes
- Emergency Department, John Radcliffe Hospital, Oxford, Oxfordshire, UK
| | - Alison Porter
- College of Medicine, Swansea University, Swansea, UK
| | - Tim Rainer
- Division of Population Medicine, Cardiff University, Cardiff, UK
| | | | - Helen Snooks
- College of Medicine, Swansea University, Swansea, UK
| | - Adrian Edwards
- Division of Population Medicine, Cardiff University, Cardiff, UK
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