Table 2.
Description of PM2.5/PM10 and meteorological factors on the days before hospitalization
| Variable | Max | 75th | Med | 25th | Min | Mean ± SD |
|---|---|---|---|---|---|---|
| The day of consultation | ||||||
| PM2.5 (μg/m3) | 151.00 | 71.00 | 47.00 | 29.00 | 8.00 | 51.56 ± 27.89 |
| PM10 (μg/m3) | 144.00 | 76.00 | 56.00 | 38.00 | 5.00 | 58.58 ± 26.37 |
| Temperature (°C) | 34.80 | 27.20 | 17.05 | 8.80 | 1.70 | 18.18 ± 9.91 |
| Relative humidity (%) | 95.00 | 80.00 | 70.00 | 62.00 | 28.00 | 70.85 ± 12.77 |
| The day before consultation | ||||||
| PM2.5 (μg/m3) | 180.00 | 68.00 | 43.00 | 28.00 | 7.00 | 52.32 ± 32.93 |
| PM10 (μg/m3) | 171.00 | 77.00 | 53.00 | 35.00 | 6.00 | 58.36 ± 29.36 |
| Temperature (°C) | 33.90 | 26.70 | 18.10 | 10.10 | − 1.00 | 17.78 ± 8.87 |
| Relative humidity (%) | 98.00 | 81.00 | 73.00 | 64.00 | 28.00 | 71.97 ± 12.92 |
| Two day before consultation | ||||||
| PM2.5 (μg/m3) | 183.00 | 74.00 | 39.00 | 25.00 | 6.00 | 52.05 ± 39.78 |
| PM10 (μg/m3) | 185.00 | 73.00 | 49.00 | 34.00 | 6.00 | 58.56 ± 35.09 |
| Temperature (°C) | 31.40 | 23.83 | 18.55 | 9.30 | 2.70 | 16.93 ± 8.14 |
| Relative humidity (%) | 95.00 | 79.00 | 70.00 | 62.00 | 38.00 | 70.80 ± 12.27 |
CRP, C-reactive protein; PM2.5, Particulate matter smaller than 2.5 µm in diameter; PM10, Particulate matter smaller than 10 µm in diameter