Table 2.
Distribution of daily cardiac arrhythmia hospital admissions, meteorological data and air pollutants in 26 Chinese cities, 2014–2015
| Variable | Mean ± SD | Minimum | Percentile | Maximum | IQR | ||
|---|---|---|---|---|---|---|---|
| 25th | 50th | 75th | |||||
| PM2.5 (μg/m3) | 63.5 ± 50.6 | 5.1 | 31.5 | 49.4 | 79.0 | 897.5 | 47.5 |
| PM10 (μg/m3) | 106.8 ± 71.9 | 7.4 | 58.3 | 89.4 | 135.2 | 977.3 | 76.9 |
| SO2 (μg/m3) | 29.6 ± 32.6 | 1.9 | 11.4 | 18.8 | 33.6 | 316.9 | 22.2 |
| NO2 (μg/m3) | 44.1 ± 19.4 | 4.5 | 30.0 | 40.2 | 54.1 | 175.8 | 24.1 |
| CO (mg/m3) | 1.15 ± 0.63 | 0.14 | 0.76 | 0.99 | 1.32 | 8.41 | 0.56 |
| Temperature(°C) | 14.5 ± 10.9 | −25.7 | 7.0 | 16.4 | 23.3 | 35.5 | 16.3 |
| Relative humidity (%) | 69.2 ± 33.2 | 8 | 53 | 69 | 80 | 97 | 27 |
| Daily arrhythmia admissions | 240.1 ± 129.8 | 2 | 93 | 270 | 320 | 555 | 227 |
SD standard deviation, IQR interquartile range