The geographic distribution of breast cancer incidence in Massachusetts 1988 to 1997, adjusted for covariates

Table 3 Purely spatial analyses. Age-adjusted female invasive breast cancer statistics for the purely spatial analyses, Massachusetts, 1988–1997. ^a Relative Risk. ^bArea covers more geographic area than in the age-adjusted analysis. ^cArea covers more geographic area than in the analysis adjusted for SES. ^d Area covers less geographic area than in the age-adjusted analysis. ^e High 11 is a combination of Highs 2 and 10. *High or low area was not significant for this analysis.

	Age-adjusted only			Adjusted for Urban/Rural Status
Area	Observed	RR^a	p-value	Observed	RR^a	p-value
High
1	3344	1.15	<0.0001	3344	1.15	<0.0001
2	94	2.73	<0.0001	94	2.40	<0.0001
3	57	2.73	<0.0001	57	2.72	<0.0001
4	126	1.75	0.0002	126	1.74	0.0007
5	276	1.44	0.0003	276	1.43	0.0008
6	1258	1.17	0.0008	1258	1.17	0.0013
7	16	5.05	0.0054	16	5.03	0.0062
8	1354	1.15	0.0060	1354	1.15	0.0097
9	874	1.18	0.0163	874	1.18	0.0190
10	941	1.17	0.0228	997	1.17	0.0120
11^e	*	*	*	*	*	*
Low
A	1068	0.74	<0.0001	1068	0.74	<0.0001
B	521	0.77	<0.0001	521	0.76	<0.0001
C	2276	0.89	<0.0001	*	*	*
D	588	0.81	0.0012	*	*	*
E	*	*	*	3600	0.91	0.0004
F	*	*	*	*	*	*
	Adjusted for SES			Adjusted for SES & Urban/Rural Status
High
1	*	*	*	*	*	*
2	*	*	*	*	*	*
3	57	3.20	<0.0001	57	3.21	<0.0001
4	*	*	*	*	*	*
5	*	*	*	*	*	*
6	1418^b	1.16	0.0015	1418^b	1.15	0.0021
7	16	5.93	0.0013	16	5.93	0.0006
8	*	*	*	*	*	*
9	*	*	*	*	*	*
10	*	*	*	*	*	*
11^e	1763	1.21	<0.0001	1994^c	1.21	<0.0001
Low
A	498^d	0.73	<0.0001	498^d	0.73	<0.0001
B	528^b	0.82	0.0204	528^b	0.82	0.0226
C	2196	0.91	0.0221	*	*	*
D	588	0.83	0.0243	588	0.83	0.255
E	*	*	*	*	*	*
F	15	0.36	0.0335	*	*	*

ISSN: 1476-072X