Evidence map›Paper›PMID 7650465›Full record

ArticleJournal of epidemiology and community health1995

Coronary revascularisation: why do rates vary geographically in the UK?

N Black, S Langham, M Petticrew

Abstract read
In one paragraph

Article in Journal of epidemiology and community health, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
–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

31 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Effective management of stable angina.Quality in health care : QHC · 1998
    Pooled it
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  9. South Asians and coronary heart disease: always bad news?The British journal of general practice : the journal of the Royal College of General Practitioners · 2011
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  12. Who cares in England and Wales? The Positive Care Law: cross-sectional study.The British journal of general practice : the journal of the Royal College of General Practitioners · 2004
    Article
  13. Article
  14. Need for redefining needs.Health and quality of life outcomes · 2003
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

N BlackDepartment of Public Health and Policy, London School of Hygiene and Tropical Medicine.
S Langham
M Petticrew

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo explain the reasons for geographical variation in the use of coronary revascularisation in the United Kingdom.

designThis was a cross sectional ecological study.

settingNHS and independent hospitals performing coronary revascularisation for the 11.6 million residents of the south east Thames, East Anglian and north western health regions in England plus Greater Glasgow, Lanarkshire, Ayr and Arran health boards in Scotland were included. SUBJECTS: All residents aged > or = 25 years in 1992-93 who underwent coronary artery bypass grafting (CABG) or percutaneous transluminal coronary angioplasty (PTCA) in either the public or private sector were included. MAIN MEASURES: Crude and age-sex standardised intervention rates for residents of the 42 constituent districts and boards were determined. Variation was measured using the systematic component of variation.

resultsConsiderable systematic variations in district rates of CABG and PTCA existed. These variations mostly arose from differences in supply factors. Higher rate districts were characterised by being close to a regional revascularisation centre and having a local cardiologist. Demand factors such as the level of need in the population (measured by coronary heart disease mortality) and the lack of use of alternative treatments not only failed to explain the observed variation but were inversely associated with the rate of intervention--an example of the inverse care law. The finding that the residents of more socially deprived districts experienced higher intervention rates was probably subject to confounding due to their close proximity to specialist centres.

conclusionsIf greater geographical equity of use for the same level of need is to be achieved, attention must be paid to the supply factors that determine levels of utilisation. As responsibility for purchasing these procedures is decentralised, utilisation might become even more unequal.

Indexed as

AdultAgedAngioplasty, Balloon, CoronaryConfounding Factors, EpidemiologicCoronary Artery BypassCoronary DiseaseCross-Sectional StudiesHealth Services AccessibilityHealth Services Needs and DemandHumansMiddle AgedSocioeconomic FactorsUnited Kingdom

Identifiers

PMID7650465
PMCPMC1060130

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.