Table 1.
Variable definition and descriptive statistics (N=841)
| Factor | Dimension | Variable | Mean | SD | Min | Max |
|---|---|---|---|---|---|---|
| Lung cancer incidence (cases) | 13.45 | 9.11 | 0 | 129 | ||
| Urban form | Population density | Population density (104/km2) | 4.87 | 2.69 | 0.04 | 15.23 |
| Building density | Building coverage (%) | 32.17 | 11.15 | 10.27 | 67.70 | |
| FAR (m2/m2) | 2.04 | 0.78 | 0.41 | 7.49 | ||
| Urban form complexity | Averaged block size (km2) | 0.11 | 0.10 | 0.01 | 0.84 | |
| Averaged block perimeter area ratio (km/km2) | 15.97 | 5.76 | 5.70 | 40.30 | ||
| Building height deviation (m) | 12.82 | 8.38 | 0 | 48.65 | ||
| Road traffic | Road density | Total road density (100-m buffer zone, km/km2) | 12.13 | 3.76 | 5.54 | 27.89 |
| Arterial road density (100-m buffer zone, km/km2) | 1.27 | 1.44 | 0 | 6.29 | ||
| Exposure distance | Distance to the nearest elevated road (km) | 0.96 | 0.72 | 0.05 | 3.05 | |
| Distance to the nearest arterial road (km) | 0.34 | 0.24 | 0 | 1.21 | ||
| Public transport services | Metro station density (800-m buffer zone, #/km2) | 0.64 | 0.32 | 0 | 1.58 | |
| Density of metro station without the glass barrier system (800-m buffer zone, #/km2) | 0.16 | 0.26 | 0 | 1.10 | ||
| Greenness | Green space coverage | NDVI index | 0.24 | 0.06 | 0.13 | 0.54 |
| Demographic factors | Aging level | Proportion of population over 60 years (%) | 20.49 | 4.85 | 5.33 | 38.68 |
| Residential turnover | Proportion of permanent residents (living for more than 5 years, %) | 72.37 | 14.17 | 0 | 100 | |
| Socio-economic factors | Housing quality | Percentage of high-quality residential land (%) | 37.44 | 22.34 | 0 | 93.43 |
| Percentage of low-quality residential land (%) | 11.66 | 17.28 | 0 | 78.29 | ||
| Education level | Percentage of population with a college degree (%) | 32.05 | 14.42 | 3.94 | 72.16 |