Table 1.
Characteristic of air pollutants, climate condition and daily outpatient visit for total respiratory disease, asthma and chronic airway obstruction not elsewhere classified (CAO) in Taipei Metropolitan during 2000–2009.
| Covariates | Minimum | 25% | 50% | 75% | Maximum | Mean |
|---|---|---|---|---|---|---|
| PM10 (μg/m3) | 10.7 | 31.4 | 43.6 | 60.1 | 286 | 48.4 |
| NO2 (ppb) | 3.90 | 23.1 | 30.1 | 39.5 | 119 | 33.0 |
| O3, max (ppb) | 9.65 | 36.8 | 46.8 | 65.2 | 143 | 52.9 |
| O3, 8 h (ppb) | 6.95 | 29.5 | 38.3 | 49.7 | 107 | 40.6 |
| O3, 24 h (ppb) | 4.53 | 19.0 | 24.9 | 31.2 | 73.1 | 25.5 |
| Ox (ppb) | 8.88 | 42.1 | 48.5 | 55.7 | 91.6 | 48.8 |
| Temperature (°C) | 8.30 | 19.3 | 23.9 | 28.0 | 33.0 | 23.4 |
| Relative humidity (%) | 37.0 | 69.0 | 75.0 | 83.0 | 98.0 | 75.7 |
| Wind speed (m/sec) | 0 | 1.60 | 2.40 | 3.60 | 7.90 | 2.61 |
| Daily hospital admissions | ||||||
| Respiratory diseases | 50 | 1750 | 2398 | 3096 | 6769 | 2443 |
| Asthma | 0 | 1 | 2 | 7 | 26 | 4 |
| Chronic airway obstruction not elsewhere classified | 0 | 7 | 16 | 22 | 51 | 15 |
| Pneumonia and influenza | 0 | 10 | 16 | 23 | 91 | 17 |