Table 4.

Space-time analyses. Age-adjusted female invasive breast cancer statistics for space-time analyses of Massachusetts, 1988–1997. ^aObserved count. ^bRelative Risk. ^cArea is shifted east compared to the purely spatial analyses. ^dArea is significant for 1993–1997 and has dramatically increased geographic area. ^eArea is significant for 1988–1993 only. ^fGeographic area increased from the age-adjusted analysis. ^gGeographic area slightly decreased from the age-adjusted analysis. *High or low area was not significant for this analysis.

		Age-adjusted only			Adjusted for Urban/Rural Status
	Time Frame	Obsa	RRb	p-value	Obsa	RRb	p-value
High
1	91–97	3639	1.16	<0.0001	3639	1.16	<0.0001
3	89–96	51	3.05	<0.0001	51	3.04	0.0002
4	88–97	126	1.75	0.0078	126	1.74	0.0127
5	88–97	276	1.44	0.0091	276	1.43	0.0154
6	92–95	492	1.35	0.0004	492	1.35	0.0007
7	88–95	*	*	*	*	*	*
8	92–97	841c	1.23	0.0034	841c	1.23	0.0085
11	93–97	1178	1.28	<0.0001	1178	1.28	<0.0001
Low
A	88–97	1068	0.74	<0.0001	1068	0.74	<0.0001
B	88–94	1119	0.81	<0.0001	1119	0.81	<0.0001
C	88–96	1951	0.86	<0.0001	1951	0.87	0.0002
D	88–95	450	0.77	0.0069	450	0.78	0.0246
		Adjusted for SES			Adjusted for SES & Urban/Rural Status
High
1	91–97	*	*	*	*	*	*
3	89–96	51	3.58	<0.0001	51	3.59	<0.0001
4	88–97	*	*	*	*	*	*
5	88–97	*	*	*	*	*	*
6	92–95	492	1.35	0.0008	492	1.34	0.0005
7	88–95	15	6.95	0.0130	15	6.95	0.0102
8	92–97	2991d	1.12	0.0009	2991d	1.12	0.0011
11	93–97	1178	1.29	<0.0001	1178	1.31	<0.0001
Low
A	88–97	600e	0.75	<0.0001	600e	0.74	<0.0001
B	88–94	1219f	0.86	0.0303	1219f	0.86	0.0301
C	88–96	1927g	0.88	0.0134	*	*	*
D	88–95	*	*	*	*	*	*