Table 1.

Characteristics of cohorts in three time periods,^a n (%) unless otherwise indicated

Variable	Pre-reminder 2004	Post-implementation 2006	Maintenance 2007 Jan 1–July 1	p-valued
n	14,831	17,361	7,859
Age (M±SD)	59.4±11.4	59.3±10.8	59.1±10.9	<0.001
Neighborhood data				0.046
Raceb	13,627 (92.3)	15,989 (92.5)	7,158 (91.7)
White	273 (1.9)	275 (1.6)	136 (1.7)
Black	859 (5.8)	1,013 (5.9)	516 (6.6)
Other
Some collegec	6,063 (41.7)	6,645 (38.9)	3,319 (43.1)	<0.001
Marriedc	11,197 (77.1)	13,476 (79.0)	5,965 (77.5)	0.038
Income (family) <$40,000 per yearc	2,159 (14.9)	2,476 (14.5)	1,050 (13.6)	0.052
PCP visite	11,639 (78.5)	13,392 (77.1)	6,039 (76.8)	0.002
OB/GYN visite	2,140 (14.4)	2,500 (14.4)	1,089 (13.9)	0.440
Number of medications (M±SD)	3.9±4.3	3.8±4.3	5.4±5.0	<0.001

^aFor all women, 20 months had passed since their prior mammogram (index date). All variables were assessed during the baseline period, except for PCP and OB/GYN visits.

^bRace available at individual level in 31,124 (77.7%); the missing cases were geocoded

^cBased on geocoded information

^dComparison across all three groups; p-values based on generalized estimating equation models

^eOne or more visits to PCP or OB/GYN during 10 months of follow-up period OB/GYN, obstetrician/gynecologist; PCP, primary care provider