Table 5

Unstandardized regression coefficients and P-values for built environment, perceived safety, and their interactions in the NQLS sample
Outcome variable
Total MVPAa from accelerometers Natural log of walking for transportationa Natural log of walking for leisurea
n = 1995 n = 2065 n = 2068
ICC = .09d ICC = .04d ICC = .00d
B (95% CI) P-value B (95% CI) P-value B (95% CI) P-value
Walkability index M1 9.48 (5.31, 13.65) .000* M10 0.18 (0.12–0.25) .000*
 Traffic safety 17.15 (.04, 24.27) .049* 0.24 (0.01–0.48) .042*
 Interaction −2.63 (−8.22, 2.96) .357 −0.04 (−0.12–0.03) .271
Walkability index M2 7.81 (3.69, 11.94) .000* M11 0.18 (0.12–0.24) .000*
 Pedestrian safety 40.26 (18.02, 62.51) .000* 0.46 (0.16–0.76) .002*
 Interaction 7.48 (.86, 14.09) .027* −0.01 (−0.1–0.07) .796
Walkability index M3 9.99 (5.99, 13.99) .000* M12 0.18 (0.12–0.24) .000*
 Crime safety 13.41 (−5.43,32.25) .163 0.01 (−0.25–0.28) .925
 Interaction −6.51 (−12.34, −0.69) .028* −.005 (−0.13–0.03) .199
Parks M4 −15.46 (−52.55, 21.63) .412 M13 −0.03 (−0.48–0.43) .909
 Traffic safety 16.44 (−6.45, 39.33) .159 0.25 (0.06–0.57) .112
 Interaction 11.11 (−34.42, 56.64) .632 0.16 (-0.46–0.78) .618
Parks M5 −9.70 (−46.98, 27.57) .609 M14 −0.04 (−0.50–0.43) .875
 Pedestrian safety 17.95 (−11.96, 47.86) .239 0.39 (−0.02–0.80) .061
 Interaction 76.32 (16.93, 135.71) .012* 0.17 (−0.64–0.98) .681
Parks M6 −1.26 (−41.86, 39.33) .951 M15 0.22 (−0.30–0.75) .403
 Crime safety 23.02 (−9.72, 55.76) .168 0.29 (−0.16–0.74) .205
 Interaction −47.73 (−112.28, 16.82) .147 −0.83 (−1.71–0.06) .070
Rec facilities M7 31.39 (6.10, 56.68) .015* M16 0.39 (0.08–0.70) .013*
 Traffic safety 19.38 (1.52, 37.24) .034 0.22 (−0.01–.046) .066
 Interaction 6.08 (−29.19, 41.35) .735 0.58 (0.10–1.05) .018*
Rec facilities M8 28.10 (2.79, 53.41) .030* M17 0.37 (0.04–0.69) .026*
 Pedestrian safety 36.90 (14.07, 59.72) .002* 0.39 (0.08–0.71) .013*
 Interaction 34.17 (−11.13, 79.47) .139 0.07 (−0.55–0.69) .821
Rec facilities M9 35.66 (9.42, 61.89) .008* M18 0.40 (0.06–0.73) .021*
 Crime safety 13.20 (−7.74, 34.19) .217 −0.05 (−0.33–0.23) .740
 Interaction −32.32 (−72.61, 7.98) .116 0.22 (−0.32–0.71) .421

MVPA = moderate to vigorous physical activity.

B = unstandardized regression coefficient.

CI = confidence interval.

ICC = intraclass correlation coefficient assessing proportion of variance between block groups.

M = model number.

aControlling for age, ethnicity, gender, education, marital status, months at address, number of people in the household and number of vehicles per adult.

dICCs are for the empty model containing no independent variables.

*Significant at p < 0.05.

Bracy et al.

Bracy et al. International Journal of Behavioral Nutrition and Physical Activity 2014 11:24   doi:10.1186/1479-5868-11-24

Open Data