Table 1.
Descriptive statistics of daily environmental variables and hospital emergency admissions over a three month period. RH: relative humidity.
| Variable | Mean | SD | Min. | Percentile | Max. | ||
|---|---|---|---|---|---|---|---|
| 25% | 50% | 75% | |||||
| Tem. (°C) | −3.5 | 3.0 | −9.7 | −5.3 | −3.5 | −1.6 | 5.0 |
| RH (%) | 53.7 | 19.4 | 19.0 | 38.0 | 52.5 | 69.5 | 91.0 |
| PM2.5 (μg/m3) | 119.8 | 96.3 | 10.2 | 49.3 | 96.3 | 170.9 | 439.3 |
| BC (μg/m3) | 5.2 | 3.8 | 0.5 | 2.1 | 4.2 | 7.5 | 19.1 |
| SO2 (μg/m3) | 56.8 | 28.6 | 10.1 | 37.6 | 51.5 | 76.8 | 131.0 |
| NO2 (μg/m3) | 68.5 | 30.6 | 12.6 | 44.9 | 69.8 | 89.3 | 144.1 |
| Res. (counts) | 26.1 | 14.8 | 7 | 16 | 21 | 34 | 79 |
| Car. (counts) | 6.1 | 2.6 | 1 | 5 | 6 | 8 | 15 |
| Ocu. (counts) | 11.3 | 6.2 | 2 | 7 | 11 | 15 | 28 |
BC: black carbon; Res.: respiratory diseases; Car.: cardiovascular diseases; Ocu.: ocular diseases.