Table 1.
Descriptive statistics of dependent and exploratory variables
| Variable | No. census tracts | Mean | Standard Deviation | Minimum | Maximum |
|---|---|---|---|---|---|
| Incidence (per year per 1000 persons) | 187 | 0.32 | 0.28 | 0.00 | 1.64 |
| Case | 187 | 2.12 | 2.01 | 0.00 | 13.00 |
| Water (%) | 187 | 1.36 | 2.59 | 0.00 | 17.64 |
| Open land (%) | 187 | 33.65 | 18.01 | 1.35 | 79.40 |
| Developed land (%) | 187 | 29.71 | 18.59 | 0.12 | 95.21 |
| Barren land (%) | 187 | 0.35 | 0.98 | 0.00 | 6.37 |
| Forest (%) | 187 | 23.06 | 17.69 | 0.00 | 95.68 |
| Shrub land (%) | 187 | 0.87 | 1.21 | 0.00 | 5.38 |
| Grassland (%) | 187 | 2.99 | 3.55 | 0.00 | 14.99 |
| Agriculture (%) | 187 | 6.04 | 8.70 | 0.00 | 37.32 |
| Wetland (%) | 187 | 1.99 | 2.74 | 0.00 | 18.24 |
| Average tree canopy (%) | 187 | 49.33 | 13.55 | 5.85 | 94.72 |
| Near-road tree canopy in 100 m (%) | 187 | 36.91 | 12.07 | 5.00 | 88.00 |
| Near-road tree canopy in 50 m (%) | 187 | 31.04 | 11.82 | 5.00 | 80.00 |
| Major road density (km/km2) | 187 | 1.26 | 0.74 | 0.00 | 4.78 |
| Greenway density (km/km2) | 187 | 1.09 | 0.75 | 0.00 | 4.05 |
| H′ (Diversity of tree canopy | 187 | 3.44 | 0.95 | 0.00 | 4.31 |
| Population density (person/km2) | 187 | 759.58 | 557.48 | 0.09 | 3347 |
| Size of census tract (km2) | 187 | 14.32 | 20.18 | 1.17 | 154.99 |
| Household in poverty (%) | 187 | 11.66 | 11.69 | 0.00 | 58.5 |
| Married household (%) | 187 | 51.77 | 19.63 | 0.00 | 100.00 |
| Unemployment (%) | 186 | 7.17 | 4.05 | 0.00 | 26.7 |
| Median income ($) | 185 | 74652 | 32413 | 17441 | 169028 |
| White (%) | 186 | 72.07 | 18.01 | 8.80 | 100 |
| Black (%) | 186 | 18.00 | 16.54 | 0.00 | 90.6 |
| Asian (%) | 186 | 5.52 | 7.41 | 0.00 | 38.8 |
| Male population (%) | 187 | 48.49 | 5.40 | 0.00 | 66.97 |
| Female population (%) | 187 | 50.98 | 5.52 | 0.00 | 62.28 |