Elsevier

Canadian Journal of Cardiology

Volume 26, Issue 7, August–September 2010, Pages e249-e253
Canadian Journal of Cardiology

Health outcomes/public policy
Estimating the number of coronary artery bypass graft and percutaneous coronary intervention procedures in Canada: A comparison of cardiac registry and Canadian Institute for Health Information data sourcesL’évaluation du nombre de pontages aortocoronariens et d’interventions coronaires percutanées au Canada : Une comparaison des sources de données des registres cardiaques et de l’Institut canadien d’information sur la santé

https://doi.org/10.1016/S0828-282X(10)70416-5Get rights and content

Background

Provincial cardiac registries and the Canadian Institute for Health Information (CIHI) pan-Canadian administrative databases are invaluable tools for understanding Canadian cardiovascular health and health care. Both sources are used to enumerate cardiovascular procedures performed in Canada.

Objective

To examine the level of agreement between provincial cardiac registry data and CIHI data regarding procedural counts for coronary artery bypass grafts (CABGs) and percutaneous coronary interventions (PCIs).

Methods

CIHI staff obtained CABG and PCI counts from seven provinces that, in 2004, performed these procedures and had a cardiac registry (ie, British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Nova Scotia, and Newfoundland and Labrador). Structured mail questionnaires, and e-mail and telephone follow-ups elicited information from a designated registry respondent. The CIHI derived its counts of CABG and PCI procedures by applying the geographical boundaries, procedural definitions and analytical case criteria used by the cardiac registries to CIHI inpatient and day procedure databases. Steps were taken to reduce double-counting procedures when combining results from the two CIHI databases. Two measures were calculated: the absolute difference between registry and CIHI estimates, and the per cent agreement between estimates from the two sources.

Results

All seven cardiac registries identified as eligible for the study participated. Agreement was high between the two sources for CABG (98.8%). For PCI, the level of agreement was high (97.9%) when CIHI sources were supplemented with day procedure data from Alberta.

Conclusions

The high level of agreement between cardiac registry and CIHI administrative data should increase confidence in estimates of CABG and PCI counts derived from these sources.

Historique

Les registres cardiaques provinciaux et les bases de données pancanadiennes de l’Institut canadien d’information sur la santé (ICIS) représentent des outils inestimables pour comprendre la santé et les soins de santé cardiovasculaires au Canada. Les deux sources sont utilisées pour déterminer le nombre d’interventions cardiovasculaires exécutées au Canada.

Objectif

Examiner le taux de concordance entre les données des registres cardiaques provinciaux et celles de l’ICIS au sujet du nombre de pontages aortocoronariens (PAC) et d’interventions coronaires percutanées (ICP).

Méthodologie

Le personnel de l’ICIS a obtenu le nombre de PAC et d’ICP auprès de sept provinces qui, en 2004, ont effectué ces interventions et disposaient d’un registre cardiaque (soit la Colombie- Britannique, l’Alberta, la Saskatchewan, le Manitoba, l’Ontario, la Nouvelle-Écosse et Terre-Neuve-et-Labrador). Des questionnaires structurés envoyés par la poste et un suivi téléphonique ont permis d’obtenir de l’information auprès d’un répondant désigné des registres. L’ICIS a dérivé le nombre de PAC et d’ICP de l’application des frontières géographiques, de la définition des interventions et des critères de cas analytiques utilisés par les registres pour les patients hospitalisés et les bases de données d’interventions d’un jour de l’ICIS. Des mesures ont été prises pour réduire les dédoublements lors de la combinaison des résultats des deux bases de données de l’ICIS. Deux mesures ont été calculées : la différence absolue entre l’évaluation des registres et celle de l’ICIS et la concordance en pourcentage entre les évaluations des deux sources.

Résultats

Les sept registres cardiaques déterminés comme admissibles à l’étude y ont participé. La concordance était élevée entre les deux sources à l’égard du PAC (98,8%). Pour ce qui est de l’ICP, le taux de concordance était élevé (97,9%) lorsque les sources de l’ICIS étaient complétées par les données d’interventions d’un jour de l’Alberta.

Conclusions

Le fort taux de concordance entre les données du registre cardiaque et les données administratives de l’ICIS devraient accroître la confiance en matière d’évaluation du nombre de PAC et d’ICP dérivée de ces sources.

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