Table 1.

Comparison of Sample Characteristics for Respondents and Nonrespondents

	Respondents	Nonrespondents	Group difference (P-value)
N	63	15
Age
Mean (SD)	60.5 (7.1)	55.3 (5.2)	.010
Gender
Female	55 (87.3%)	14 (93.3%)	.511
Male	8 (12.7%)	1 (6.7%)
Marital status
Not currently married	27 (42.9%)	7 (46.7%)	.789
Currently married	36 (57.1%)	8 (53.3%)
Race/ethnicity
Caucasian (nonminority)	52 (82.5%)	10 (66.7%)	.171
Minority	11 (17.5%)	5 (33.3%)
Education
Fewer than 4 years of college	14 (22.2%)	11 (73.3%)	<.001
4  years of college or more	49 (77.8%)	4 (26.7%)
Employment
Not currently working	24 (38.1%)	2 (13.3%)	.067
Currently working	39 (61.9%)	13 (86.7%)
Baseline physical activity
Mean (SD)	134.3 (71.4)	168.5 (114.8)	.285