Table 3.

Correlations between block group characteristics and physical activity

	Walking	Running	Biking	Dog walking
Median family income (1999 U.S. $)	−0.35	0.32	0.22	0.51
Median home value (1999 U.S. $)	−0.45	0.04	−0.02	0.23
Block group population	−0.20	−0.06	−0.08	0.72**
Housing units	−0.39	−0.08	−0.13	0.68*
% in labor force	−0.10	−0.84***	0.21	−0.26
% of labor force working ≥35 h/wk	−0.28	−0.49	−0.19	−0.04
% of labor force working 15–34 h/wk	0.26	−0.41	0.04	0.05
% of labor force working 0 to 14 h/wk	0.01	0.70*	0.12	−0.01
% walking or biking to work	0.05	−0.60*	0.62*	−0.23
% income: poverty level ratio ≥2.0	−0.32	0.03	−0.21	0.09
% of homes built 1939 or before	0.58*	0.01	−0.49	−0.03
% with no vehicle	0.01	0.04	0.36	−0.07
% with a high school degree or less	0.41	−0.06	−0.37	−0.41
% with a bachelors degree or higher	−0.01	0.08	0.22	0.14
% manual labor occupations	0.14	−0.10	0.09	−0.28
Temperature (°C)	−0.03	0.04	0.36*	0.33*
Humidity	0.13	0.07	0.18	0.08
Barometric pressure (mb/hg)	−0.24a	−0.18	−0.18	0.18
Wind speed (mph)	0.05	−0.26	0.33*	−0.09
Rain (mm)	−0.07	0.17	−0.14	−0.06

*p < 0.05;

**p> 0.01;

***p < 0.001