Table 1 Summary statistics of the variables
| Â | Proportion | Mean (SD) |
|---|---|---|
Variable | ||
 CES-D score |  | 7.28 (9.26) |
Natural environment of the neighborhood | ||
 Green space (%) |  | 49.73 (27.29) |
Built environment of the neighborhood | ||
 Urbanicity (people/km2) |  | 29,625.05 (415,537.75) |
 Sports facilities (yes, no) | 66, 34% |  |
Social environment of the neighborhood | ||
 Social trust |  | 0.78 (0.12) |
 Social reciprocity |  | 0.48 (0.23) |
 Social group membership |  | 0.08 (0.15) |
 Gini index of household income |  | 0.43 (0.10) |
 Security |  | 0.91 (0.10) |
Covariates at the individual level | ||
 Gender (male, female) | 47, 53% |  |
 Age (years) |  | 44.81 (14.61) |
 Marital status |  |  |
  Single, divorced, or widowed | 19% |  |
  Married – living with spouse | 73% |  |
  Married – not living with spouse | 8% |  |
 Educational attainment level | ||
  Primary school or lower | 35% |  |
  High school | 52% |  |
  College or higher | 13% |  |
 Employment (employed, unemployed) | 95, 5% |  |
 Hukou status (local hukou, non-local hukou) | 91, 9% |  |
 Smoker (yes, no) | 27, 73% |  |
 Alcohol use (yes, no) | 19, 81% |  |
 Medical insurance (yes, no) | 90, 10% |  |
 Physical health status (good, bad) | 90, 10% |  |
 Neighbourhood type (urban neighbourhood, rural neighbourhood) | 38, 62% |  |
 Social trust (trustworthy, not trustworthy) | 22, 78% |  |
 Social reciprocity (people often help each other, seldom/never) | 48, 52% |  |
 Social group membership (number of social groups) |  | 0.08 (0.37) |
 Sense of safety (safe, unsafe) | 91, 9% |  |
 Average annual household income per household member (CNY) |  | 18,010.46 (204,076.28) |
 Average annual neighborhood income per neighborhood resident (CNY) |  | 17,826.38 (32,388.29) |