Table A3.

Adjusted odds ratios for participation in physical activity according to tertiles of selected land characteristics based on 250m and 500m buffers, by population size of census tract, the Sister Study

Land cover characteristic	Population Size of Census Tract
	< 4162			4162 – < 6006			≥ 6006
	Mean MET-hrs	OR	95% CI	Mean MET-hrs	OR	95% CI	Mean MET-hrs	OR	95% CI
G1 (250 buffer)
Lowest tertile	49.0	1.0		49.5	1.0		48.7	1.0
Middle tertile	51.0	1.11	1.02 – 1.22	50.5	1.05	0.97 – 1.15	49.9	1.10	1.01 – 1.20
Upper tertile	54.7	1.34	1.23 – 1.46	53.0	1.18	1.08 – 1.29	52.2	1.18	1.08 – 1.29
G2 (250 buffer)
Lowest tertile	48.8	1.0		49.3	1.0		48.1	1.0
Middle tertile	51.0	1.16	1.07 – 1.27	50.5	1.10	1.00 – 1.20	49.9	1.10	1.00 – 1.20
Upper tertile	53.8	1.34	1.22 – 1.46	52.6	1.24	1.13 – 1.36	51.9	1.18	1.08 – 1.29
Impervious (250 buffer)
Lowest tertile	54.8	1.0		53.4	1.0		53.3	1.0
Middle tertile	51.2	0.82	0.75 – 0.90	50.9	0.86	0.79 – 0.94	50.0	0.82	0.75 – 0.89
Upper tertile	47.5	0.65	0.59 – 0.71	48.0	0.70	0.64 – 0.77	46.7	0.64	0.58 – 0.71
G1 (500 buffer)
Lowest tertile	48.8	1.0		49.4	1.0		48.4	1.0
Middle tertile	50.6	1.13	1.04 – 1.24	50.6	1.05	0.96 – 1.15	49.9	1.08	0.98 – 1.18
Upper tertile	54.1	1.32	1.21 – 1.45	52.3	1.13	1.04 – 1.24	51.6	1.16	1.06 – 1.27
G2 (500 buffer)
Lowest tertile	49.0	1.0		49.4	1.0		48.2	1.0
Middle tertile	50.9	1.16	1.06 – 1.26	50.7	1.07	0.98 – 1.17	49.5	1.05	0.96 – 1.15
Upper tertile	53.7	1.30	1.18 – 1.42	52.3	1.19	1.08 – 1.30	52.1	1.23	1.12 – 1.36
Impervious (500 buffer)
Lowest tertile	54.8	1.0		53.3	1.0		53.4	1.0
Middle tertile	50.4	0.78	0.72 – 0.85	50.9	0.86	0.79 – 0.94	49.7	0.80	0.74 – 0.87
Upper tertile	48.1	0.69	0.63 – 0.75	48.1	0.73	0.66 – 0.80	46.9	0.65	0.59 – 0.72

^*The cut-point used for to define those physically active was 67.1 MET-Hours per week (which represented the upper tertile). Odds ratios adjusted for age, ethnicity, marital status, and census area