Table 1 Air pollutant, weather conditions, and emergency ambulance dispatches for asthma cases between 2013 and 2017 in Chengdu
| Â | Mean | SD | Min. | 25% | 50% | 75% | Max. | IQR |
|---|---|---|---|---|---|---|---|---|
SO2 (μg/m3) | 21.6 | 10.5 | 6.0 | 14.0 | 20.0 | 27.0 | 71.0 | 13.0 |
NO2 (μg/m3) | 41.5 | 13.2 | 13.0 | 32.0 | 39.0 | 49.0 | 89.0 | 17.0 |
CO (μg/m3) | 1124.2 | 790.2 | 425.0 | 787.0 | 987.0 | 1285.0 | 16,608.0 | 498.0 |
O3-8 h (μg/m3) | 92.4 | 49.6 | 11.0 | 54.0 | 82.0 | 128.0 | 285.0 | 74.0 |
PM2.5 (μg/m3) | 70.5 | 48.9 | 9.0 | 36.0 | 56.0 | 89.0 | 372.0 | 53.0 |
Temperature (°C) | 17.0 | 7.2 | −1.9 | 10.3 | 17.9 | 23.2 | 30.0 | 12.9 |
Humidity (%) | 77.7 | 9.7 | 41.0 | 72.0 | 78.0 | 85.0 | 98.0 | 13.0 |
AP (hpa) | 951.7 | 7.4 | 933.1 | 945.6 | 951.2 | 957.4 | 977.3 | 11.8 |
EADs (tpd) | 1.5 | 1.3 | 0.0 | 0.0 | 1.0 | 2.0 | 6.0 | 2.0 |