Table 5.

Average weekly rate of CABG in British Columbia, 1991–2000 and adjusted hazard ratios by registration period

Registration Period	Number of operations	Total waiting time, weeks	Crude Rate, per 100	SE	RR	95% CI*
	Women
1991–1992	281	4094.0	6.9	(0.4)	1.00	Referent
1993–1994	260	3892.5	6.7	(0.4)	0.98	(0.82, 1.17)
1995–1996	313	6676.5	4.7	(0.3)	0.61	(0.51, 0.72)
1997–1998	293	5587.5	5.2	(0.3)	0.68	(0.57, 0.81)
1999–2000	240	4103.5	5.8	(0.4)	0.87	(0.73, 1.05)
	Men
1991–1992	1211	18773.0	6.5	(0.2)	1.00	Referent
1993–1994	1370	21221.0	6.5	(0.2)	1.01	(0.93, 1.09)
1995–1996	1403	27353.0	5.1	(0.1)	0.72	(0.66, 0.78)
1997–1998	1311	24570.0	5.3	(0.1)	0.79	(0.72, 0.85)
1999–2000	1251	19799.5	6.3	(0.2)	0.93	(0.86, 1.01)

Abbreviations: CABG = outpatient isolated coronary artery bypass surgery; SE = standard error; HR = hazard ratio; 95% CI = 95% confidence interval

*adjusted for priority group and comorbidity; stratified by age.

0 patients were on the wait list on December 31, 2001