Table 3.

Bivariate Associations Between Physical Activity and Predictor Variables at Baseline

	Vigorous Physical Activity ≥ 3 Times per Week
Predictor	Yes	No	p
Gender (%)			.000a
Male	56.2	43.8
Female	46.5	53.5
Race (%)			.000a
White	52.7	47.3
Non-White	44.0	56.0
Work status (%)			.000a
Working for pay	57.0	43.0
Not working for pay	42.9	57.1
Marital status (%)			.000a
Married	53.0	47.0
Not married	45.7	54.3
Attrition (< 4 waves of data) (%)			.004a
Yes	47.6	52.4
No	51.7	48.3
Mean age	59.32	59.43	.07b
Mean education (years)	12.39	11.90	.07b
Mean # of chronic conditions	1.16	1.59	.03b
Mean functional limitations	0.09	0.33	.02b
Mean CESD score	0.93	1.62	.04b

Note: CESD = Center for Epidemiologic Studies Depression Scale.

^ap value for chi-square test comparing prevalence of physical activity by predictor.

^bp value for independent-samples t test comparing means between “yes” and “no” physical activity groups.