Evidence map›Paper›PMID 8431818›Full record

ArticleCMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne1993

Trends in coronary artery bypass grafting in Ontario from 1981 to 1989.

A M Ugnat, C D Naylor

Abstract read
In one paragraph

Article in CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. Coronary artery bypass grafting in elderly patients: the price of success.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1999
    Review
  6. Direct costs of coronary artery bypass grafting in patients aged 65 years or more and those under age 65.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1999
    Article
  7. Article
  8. Article
  9. Ethics of queuing for coronary artery bypass grafting in Canada.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1994
    Review
  10. Regionalized delivery and variable utilization of coronary artery bypass grafting in Ontario from 1981 to 1991.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1994
    Article
  11. Frailty in elderly people: an evolving concept.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1994
    Review
  12. Sex-related differences in coronary revascularization practices: the perspective from a Canadian queue management project.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 1993
    Article
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

2 authors.

A M UgnatClinical Epidemiology Unit, Sunnybrook Health Science Centre.
C D Naylor

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo determine the trends in overall and age-specific rates of coronary artery bypass grafting (CABG) in Ontario from 1981 to 1989 and to assess whether relative resource scarcity, as manifested in waiting lists, resulted in obvious age-related or sex-related changes in utilization.

designComputerized compilation of hospital discharge abstracts from the Hospital Medical Records Institute. All separations for every other year from Apr. 1, 1981, to Mar. 31, 1990, were included. Procedures rather than patients were the unit of analysis (repeat procedures were double-counted if associated with separate hospital admissions).

settingOntario acute care hospitals offering CABG. PATIENTS: People aged 20 years and over who underwent one or more CABG procedures.

resultsThe overall rate of CABG increased by 31% in the study period, plateauing only between 1983 and 1985. By 1989-90 the rate was 66.03 per 100,000. The highest annual increase in the rate was among people aged 65 to 74 years, at 17.61 procedures per 100,000, as compared with 4.64 per 100,000 among people 75 years and over. In 1989-90 those aged 65 and over represented 37% of the total caseload. The overall male:female ratio did not change significantly throughout the study period.

conclusionsSince the CABG utilization rate continues to increase in Ontario, recent waiting lists must be due to a disproportionate growth in demand. There was no convincing evidence of age-related or sex-related discrimination in allocating this limited resource. Supply-demand mismatch was driven above all by the continued increase in CABG use among elderly people.

Indexed as

AdultAgedAge FactorsAngioplasty, Balloon, CoronaryCoronary Artery BypassDatabases, FactualHealth Care RationingHealth Services ResearchHumansLinear ModelsMiddle AgedOntarioPatient DischargeSex FactorsWaiting Lists

Identifiers

PMID8431818
PMCPMC1490531

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.