Table 1.
Distribution of Daily Stroke Mortality, Air Conditions and Air Pollution Variables.
| Mean | Minimum | 25% | 50% | 75% | Maximum | |
|---|---|---|---|---|---|---|
| Cerebrovascular disease, N per day | 43.9 | 11.0 | 38.0 | 43.0 | 50.0 | 76.0 |
| Ischemic stroke, N per day | 29.9 | 10.0 | 25.0 | 30.0 | 34.0 | 55.0 |
| Hemorrhagic stroke, N per day | 11.9 | 1.0 | 9.0 | 12.0 | 14.0 | 24.0 |
| PM2.5, μg/m3 | 79.1 | 5.2 | 29.8 | 60.0 | 106.4 | 477.5 |
| PM10, μg/m3 | 103.8 | 1.7 | 47.0 | 86.8 | 135.9 | 480.8 |
| NO2, μg/m3 | 50.6 | 8.1 | 33.5 | 44.5 | 61.4 | 153.5 |
| SO2, μg/m3 | 14.4 | 1.8 | 3.6 | 7.9 | 17.4 | 133.1 |
| O3, μg/m3 | 110.4 | 3.0 | 57.0 | 92.0 | 158.5 | 343.0 |
| Temperature, °C | 13.8 | −14.3 | 2.8 | 15.6 | 24.0 | 32.6 |
| Humidity, % | 53.1 | 8.0 | 37.0 | 53.0 | 68.5 | 99.0 |
PM2.5 indicates particulate matter <2.5 μm in aerodynamic diameter, PM10 indicates particulate matter <10 μm in aerodynamic diameter, NO2, nitrogen dioxide; SO2, sulfur dioxide; O3, ozone.