Table 1 Summary of basic descriptive statistics of the study population and air pollution

Total patients

10,325

Male

4933 (47.78%)

Male, years

74.41 ± 12.18

Female, years

78.39 ± 10.40

Age, years

76.49 ± 11.46

< 41, years

34.40 ± 5.11

41–65, years

58.78 ± 5.78

> 65, years

80.41 ± 7.35

ST-T

5056 (48.97%)

FVR

3263 (31.60%)

SVR

328 (3.18%)

CB

2152 (20.84%)

NSVT

39 (0.38%)

VPB

1271 (12.31%)

PM2.5 (µg/m³)

43.02 ± 28.74

PM10 (µg/m³)

63.46 ± 36.95

O3 (µg/m³)

105.16 ± 45.79

SO2 (µg/m³)

13.26 ± 6.86

NO2 (µg/m³)

43.73 ± 19.91

CO (mg/m³)

0.77 ± 0.27