Table 2 Descriptive statistics of covariates from 2014 to 2020
Covariate | Mean ± SD | Min | P25 | Median | P75 | Max |
|---|---|---|---|---|---|---|
Environmental factors | ||||||
PM10(μg/m3) | 62.03 ± 14.51 | 30.00 | 52.00 | 61.00 | 71.00 | 114.00 |
SO2(μg/m3) | 15.98 ± 7.64 | 5.00 | 11.00 | 14.00 | 19.00 | 55.00 |
NO2(μg/m3) | 30.47 ± 10.01 | 12.00 | 23.00 | 30.00 | 38.00 | 66.00 |
Demographic | ||||||
PD (people/km2) | 1451.65 ± 4057.95 | 56.18 | 212.29 | 420.66 | 688.03 | 27,823.28 |
UR (%) | 60.01 ± 20.36 | 29.66 | 43.24 | 55.94 | 70.43 | 100.00 |
PEIA (%) | 43.36 ± 20.77 | 0.00 | 30.78 | 49.33 | 58.00 | 81.85 |
Economic factors | ||||||
PGDP(1000 yuan) | 57.32 ± 38.56 | 12.16 | 29.70 | 47.46 | 72.96 | 258.15 |
DIUR(1000 yuan) | 31.85 ± 6.42 | 18.11 | 27.03 | 31.13 | 36.66 | 46.99 |
DIRR (1000 yuan) | 13.71 ± 4.61 | 4.53 | 10.75 | 13.69 | 16.74 | 24.87 |
LINA per 1000 persons | 24.03 ± 16.56 | 2.26 | 11.32 | 19.95 | 30.61 | 85.31 |