Table 1.
Daily clinic visits for headaches, weather, and air pollution variables in Taipei, Taiwan, 2006–2011.
| Variable a | Min | Percentile | Max | Mean | ||
|---|---|---|---|---|---|---|
| 25% | 50% | 75% | ||||
| PM10 (ug/m3) | 14.26 | 34.23 | 45.79 | 61.04 | 888.02 | 50.67 |
| SO2 (ppb) | 1.00 | 2.58 | 3.51 | 4.72 | 11.14 | 3.79 |
| NO2 (ppb) | 3.22 | 19.86 | 23.65 | 28.35 | 61.94 | 24.44 |
| CO (ppm) | 0.13 | 0.49 | 0.62 | 0.78 | 1.99 | 0.66 |
| O3 (ppb) | 4.00 | 17.92 | 23.77 | 30.42 | 70.89 | 24.67 |
| Temperature(°C) | 9.05 | 19.33 | 24.07 | 28.49 | 33.18 | 23.60 |
| Humidity (%) | 23.56 | 66.68 | 73.13 | 79.70 | 94.19 | 72.86 |
| Headache visits | 1 | 32 | 40 | 47 | 75 | 37.01 |
Abbreviation: Min, minimum value; Max, maximum value. a 24-h average.