Table 2 Descriptive statistics of daily emergency department visits, air pollutants, and meteorological factors in Haikou City from 2018 to 2021.
Variables | Mean | SD | Min | Median | Max | IQR |
|---|---|---|---|---|---|---|
Total | 713 | 148.35 | 280 | 721 | 1196 | 188 |
Male | 380 | 80.90 | 136 | 384 | 676 | 108 |
Female | 333 | 71.17 | 121 | 335 | 538 | 88 |
Age, years | ||||||
≤ 14 | 96 | 43.53 | 13 | 86 | 325 | 57 |
15–34 | 224 | 47.20 | 68 | 227 | 388 | 53 |
35–64 | 272 | 55.55 | 93 | 270 | 516 | 68 |
≥ 65 | 121 | 34.64 | 26 | 117 | 263 | 42 |
Meteorology | ||||||
Temperature(℃) | 25.24 | 4.38 | 8.50 | 26.20 | 33.00 | 6.20 |
Relative humidity(%) | 80.33 | 8.20 | 36.00 | 81.00 | 99.00 | 11.00 |
Sun time(h) | 5.32 | 3.86 | 0 | 5.60 | 12.80 | 7.50 |
Wind speed(m/s) | 2.80 | 0.82 | 0.70 | 2.70 | 6.80 | 1.10 |
Air pressure(hpa) | 1004.01 | 6.20 | 984.90 | 1004.20 | 1019.00 | 9.80 |
Air pollution | ||||||
PM2.5(µg/m3) | 15.67 | 9.30 | 0 | 13.00 | 62.00 | 10.00 |
PM10(µg/m3) | 30.16 | 13.22 | 0 | 27.00 | 115.00 | 16.00 |
NO2(µg/m3) | 11.38 | 4.80 | 2.00 | 11.00 | 41.00 | 6.00 |
SO2(µg/m3) | 4.62 | 1.82 | 2.00 | 4.00 | 23.00 | 1.00 |
CO(mg/m3) | 0.54 | 0.14 | 0.20 | 0.50 | 1.20 | 0.20 |
O3(µg/m3) | 77.81 | 32.47 | 20.00 | 71.00 | 207.00 | 40.00 |
