TABLE 2.

Agreement between the percutaneous coronary intervention (PCI) counts from the Canadian Institute for Health Information (CIHI)’s databases and cardiac registries, 2004^*

Province	PCI count, n			Agreement§, %
	CIHI database†	Cardiac registry	Absolute difference‡
British Columbia	6747	6897	150	97.8
Alberta (CIHI data only)	3319	5083	1764	65.3
Alberta (CIHI and AHW¶ data)	5078	5083	5	99.9
Saskatchewan**	700	686	14	98.0
Manitoba	1297	1285	12	99.1
Ontario	17,340	17,881	541	97.0
Nova Scotia	1632	1651	19	98.8
Newfoundland and Labrador	614	635	21	96.7
Overall
Without AHW data	31,649	34,118	2469	92.8
With AHW data	33,408	34,118	710	97.9

^*Fiscal year (ie, April 1, 2004, to March 31, 2005) for all provinces;

^†Discharge Abstract Database and National Ambulatory Care Reporting System;

^‡Absolute difference = |CIHI count – cardiac registry’s count|;

^§Per cent agreement = 100% – (absolute difference / cardiac registry’s count) × 100;

^¶Alberta Health and Wellness (AHW) Ambulatory Care Database: same day surgery PCI data obtained at special request;

^**Limited to Regina Qu’Appelle Regional Health Authority