Table 1.

Summary statistics for fitted regression models

A)
Comb Pk/Yrs: n = 103
Variable	Coefficient (β)	Standard Error	95% CI	t Stat	P
Intercept	17.152	2.966	11.268 to 23.036	5.783	<10−5
Age	0.2188	0.068	0.084 to0.353	3.231	0.00167
Pk/Yrs	0.1903	0.060	0.071 to 0.309	3.165	0.00205

B)
Comb Exercise minutes per month: n = 80
Variable	Coefficient (β)	Standard Error	95% CI	t Stat	P
Intercept	3041.330	296.967	2449.994 to 3632.665	10.241	<10−5
Age	13.513	5.743	2.078 to 24.947	2.353	0.0212
Exercise	−0.669	0.262	−1.192 to −0.147	−2.552	0.0127

C)
Comb BMI n=91
Variable	Coefficient (β)	Standard Error	95% CI	t Stat	P
Intercept	3.013	0.395	2.227 to 3.799	7.618	<10−5
Age	0.013	0.005	0.003 to 0.023	2.584	0.0114
BMI	0.036	0.013	0.010 to 0.061	2.797	0.0063

Residual standard error is 10.34 on 100 degrees of freedom.

Model R² = 24%

Residual standard error is 782.9 on 77 degrees of freedom.

Model R² = 19%

Residual standard error is 0.7743 on 88 degrees of freedom.

Model R² = 16%