Evidence map›Paper›PMID 33685922›Full record

ArticleThe British journal of general practice : the journal of the Royal College of General Practitioners2021

Are more GPs associated with a reduction in emergency hospital admissions? A quantitative study on GP referral in England.

Catia Nicodemo, Barry McCormick, Raphael Wittenberg, Fd Richard Hobbs

Abstract read
In one paragraph

Article in The British journal of general practice : the journal of the Royal College of General Practitioners, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed.

  1. Article
  2. Winter pressures in general practice in England.The British journal of general practice : the journal of the Royal College of General Practitioners · 2026
    Article
  3. Article
  4. Article
  5. Observational
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Catia NicodemoHead of Nuffield Department of Primary Care at Oxford University, Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care Health Sciences, Radcliffe Observatory Quarter, Woodstock Road, and NIHR Oxford Biomedical Research Centre, Oxford.
Barry McCormickHead of Nuffield Department of Primary Care at Oxford University, Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care Health Sciences, Radcliffe Observatory Quarter, Woodstock Road, and NIHR Oxford Biomedical Research Centre, Oxford.
Raphael WittenbergHead of Nuffield Department of Primary Care at Oxford University, Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care Health Sciences, Radcliffe Observatory Quarter, Woodstock Road, and NIHR Oxford Biomedical Research Centre, Oxford.
Fd Richard HobbsHead of Nuffield Department of Primary Care at Oxford University, Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care Health Sciences, Radcliffe Observatory Quarter, Woodstock Road, and NIHR Oxford Biomedical Research Centre, Oxford.

Funding

Medical Research Council MC_PC_11004
6 · The paper itself

Abstract

backgroundRecent studies have found an association between access to primary care and accident and emergency attendances, with better access associated with fewer attendances. Analyses of an association with emergency admissions, however, have produced conflicting findings.

aimThis study investigated whether emergency admission rates in an area are associated with 1) the number of GPs, and 2) mean size of GP practice. DESIGN AND

settingAnalysis was conducted utilising Hospital Episode Statistics, the numbers of GPs and GP practices, Office for National Statistics population data, Quality and Outcomes Framework prevalence data, and Index of Multiple Deprivation data, from 2004/2005 to 2011/2012, for all practices in England.

methodRegression analysis of panel data with fixed effects to address 1) a potential two-way relationship between the numbers of GPs and emergency admissions, and 2) unobservable characteristics of GP practices.

resultsThere is not a statistically significant relationship between the number of GPs in a primary care trust area and the number of emergency admissions, when analysing all areas. In deprived areas, however, a higher number of GPs is associated with lower emergency admissions. There is also a lower emergency admission rate in areas in which practices are on average larger, holding GP supply constant.

conclusionAn increase in GPs was found to reduce emergency admissions in deprived areas, but not elsewhere. Areas in which GPs are concentrated into larger practices showed reduced levels of emergency admissions, all else being equal.

Indexed as

HospitalizationReferral and ConsultationEmergency Service, HospitalEnglandHospitalsHumansdeprivationemergenciesemergency service, general practiceGP numberhospitalisationinstrumental variableregression analysis

Identifiers

PMID33685922
PMCPMC8007250

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.