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Table 1
Incident cases of female breast cancer, age-standardized incidence rates, and rate ratios, by age group and neighborhood income quintile, Canada, 1992 to 2004

Age group (years)/ Neighbourhood income quintile	Number of cases	Age-standardized incidence rate (per 100,000)	Rate ratio†
			%	95% confidence interval
			%	from	to
Total 19 or older
1 (lowest)	44,138	114.21	0.85	0.84	0.86
2	45,671	119.69	0.89	0.88	0.90
3	44,693	117.70	0.92	0.91	0.93
4	44,544	117.47	0.95	0.94	0.96
5 (highest)	47,943	128.00	1.00	…	…
19 to 39
1 (lowest)	2,247	10.25	0.75*	0.72	0.78
2	2,396	11.39	0.83*	0.80	0.87
3	2,631	12.47	0.91*	0.88	0.95
4	2,759	13.04	0.96	0.93	1.00
5 (highest)	2,709	13.58	1.00	…	…
40 to 49
1 (lowest)	6,631	129.91	0.93*	0.91	0.95
2	7,486	135.35	0.97*	0.95	0.99
3	7,830	132.42	0.95*	0.93	0.97
4	8,431	133.62	0.96*	0.94	0.98
5 (highest)	9,474	141.19	1.00	…	…
50 to 59
1 (lowest)	9,032	238.98	0.91*	0.90	0.93
2	9,777	239.92	0.93*	0.91	0.94
3	10,193	242.03	0.94*	0.92	0.96
4	11,010	252.57	0.99	0.97	1.01
5 (highest)	12,082	255.50	1.00	…	…
60 to 69
1 (lowest)	9,944	305.13	0.85*	0.84	0.87
2	10,524	317.57	0.90*	0.88	0.92
3	10,168	323.12	0.93*	0.91	0.94
4	9,970	333.11	0.96*	0.94	0.97
5 (highest)	10,439	347.72	1.00	…	…
70 or older
1 (lowest)	16,284	354.60	0.80*	0.79	0.82
2	15,488	368.32	0.85*	0.84	0.86
3	13,871	385.12	0.89*	0.88	0.91
4	12,384	397.29	0.92*	0.90	0.94
5 (highest)	13,239	431.94	1.00*	…	…
† reference category is highest neighbourhood income quintile (5) * significantly different from reference category … not applicable Source: Canadian Cancer Registry; 1991, 1996, 2001 and 2006 Census of Canada.