Table 2.
Built environment characteristics used one at a time to predict walking for exercise
| Built Environment Characteristic |
Median (Interquartile range) |
Walking or not C-statistic (95% CI) |
Walking time Proportion of variation explained |
| Density (thousands of residential units per km2) | 177 (105, 256) | 0.52 (0.49, 0.55) | 0.0 % |
| Connectivity (mean block size in km2) | 0.13 (0.04, 0.44) | 0.49 (0.46, 0.51) | 0.6 % |
| Sidewalksa (km of sidewalk-lined streets) | 12 (1, 33) | 0.51 (0.47, 0.54) | 0.1 % |
| Destinations (count within 1 km buffer) | |||
| Grocery stores | 1 (0, 5) | 0.50 (0.46, 0.52) | 0.0 % |
| Restaurants | 3 (0, 11) | 0.50 (0.48, 0.53) | 0.1 % |
| Retail stores | 8 (0, 26) | 0.51 (0.48, 0.54) | 0.0 % |
| Grocery-restaurant-retail complexes | 0 (0, 1) | 0.52 (0.50, 0.54) | 0.0 % |
| Offices | 6 (1, 23) | 0.52 (0.49, 0.54) | 0.2 % |
| Office complexes | 0 (0, 1) | 0.52 (0.49, 0.54) | 0.0 % |
| Banks | 1 (0, 7) | 0.49 (0.46, 0.52) | 0.1 % |
| Churches | 4 (1, 12) | 0.48 (0.44, 0.51) | 0.1 % |
| Schools | 4 (1, 9) | 0.50 (0.47, 0.53) | 0.2 % |
| School-church combinations | 0 (0, 1) | 0.50 (0.48, 0.53) | 0.2 % |
| Fitness centers | 1 (0, 5) | 0.49 (0.46, 0.52) | 0.1 % |
| Parks (percent of 1-km buffer covered) | 2 (0, 5) | 0.51 (0.49, 0.54) | 0.5 % |
Notes: Built environment characteristics were measured within a one-kilometer airline buffer; a Sidewalk data were available only for King County, and were investigated as predictors of walking in this subset