Evidence map›Paper›PMID 34495443›Full record

ArticleQuality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation2022

Measurement invariance of the Seattle Angina Questionnaire in coronary artery disease.

Oluwaseyi A Lawal, Oluwagbohunmi Awosoga, Maria J Santana, Matthew T James, Stephen B Wilton, Colleen M Norris, Lisa M Lix, Tolulope T Sajobi, APPROACH Investigators

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Article in Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

  1. Trial
  2. A multidimensional item response theory analysis of the Seattle Angina Questionnaire: measurement precision, differential item functioning, and potential for item reduction.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2026
    Article
  3. Article
  4. 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

9 authors.

Oluwaseyi A LawalDepartment of Community Health Sciences & O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive, Calgary, T2N 4Z6, Canada.
Oluwagbohunmi AwosogaFaculty of Health Sciences, University of Lethbridge, Lethbridge, Canada.
Maria J SantanaDepartment of Community Health Sciences & O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive, Calgary, T2N 4Z6, Canada.
Matthew T JamesDepartment of Community Health Sciences & O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive, Calgary, T2N 4Z6, Canada.
Stephen B WiltonDepartment of Cardiac Sciences, University of Calgary, Calgary, Canada.
Colleen M NorrisFaculty of Nursing, University of Alberta, Edmonton, Canada.
Lisa M LixDepartment of Community Health Sciences, University of Manitoba, Winnipeg, Canada.
Tolulope T SajobiDepartment of Community Health Sciences & O'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive, Calgary, T2N 4Z6, Canada. ttsajobi@ucalgary.ca.ORCID http://orcid.org/0000-0002-5696-5552
APPROACH Investigators

Funding

CIHR 400774
6 · The paper itself

Abstract

purposeThe Seattle Angina Questionnaire (SAQ) is a widely used patient-reported measure of health status in patients with coronary artery disease. Comparisons of SAQ scores amongst population groups and over time rely on the assumption that its factorial structure is invariant. This study evaluates the measurement invariance of the SAQ across different demographic and clinical groups and over time.

methodsData were obtained from the Alberta Provincial Project on Outcome Assessment in Coronary Heart Disease registry, a registry of patients who received coronary angiogram in Alberta, Canada. The study cohort consists of adult patients who completed the paper-based version of the 16-item Canadian version of the SAQ (SAQ-CAN) 2 weeks and 1-year post-coronary angiogram between 2009 and 2016. Multi-group confirmatory factor analysis was used to assess configural, weak, strong, and strict measurement invariance across age groups, sex, angina type, treatment, and over time. Model fit was assessed using the comparative fit index and root mean square error of approximation.

resultsOf the 8101 patients included in these analysis, 1300 (16.1%) were at least 75 years old, while 1755 (21.7%) were female, 5154 (63.6%) were diagnosed with acute coronary syndrome, 1177 (14.5%) received coronary artery bypass graft treatment, and 3279 had complete data on the SAQ-CAN at both occasions. There was evidence of strict invariance across age, sex, and angina type, and treatment groups, but partial strict invariance was established over time.

conclusionSAQ-CAN can be used to compare the health status of coronary artery disease patients across population groups and over time.

Indexed as

Coronary Artery DiseaseAgedAlbertaAngina PectorisFemaleHumansQuality of LifeSurveys and QuestionnairesConfirmatory factor analysisCoronary artery diseaseMeasurement invarianceSeattle Angina Questionnaire

Identifiers

PMID34495443

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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.