Table 1.
Summary statistics of daily deaths, air pollutant concentrations, and weather conditions in Shanghai (2001–2004).
| Variable | Mean ± SD | Minimum | 25th percentile | Median | 75th percentile | Maximum |
|---|---|---|---|---|---|---|
| Daily death counts | ||||||
| Total (nonaccident) | 119.0 ± 22.5 | 51.0 | 103.0 | 115.0 | 133.0 | 198.0 |
| Cardiovascular | 44.2 ± 11.0 | 11.0 | 36.0 | 43.0 | 51.0 | 85.0 |
| Respiratory | 14.3 ± 6.4 | 3.0 | 10.0 | 13.0 | 17.0 | 45.0 |
| Air pollutant concentrationsa | ||||||
| O3 (μg/m3) | 63.3 ± 36.7 | 5.3 | 37.6 | 56.1 | 82.7 | 251.3 |
| PM10 (μg/m3) | 102.0 ± 64.8 | 14.0 | 56.3 | 84.0 | 128.3 | 566.8 |
| SO2 (μg/m3) | 44.7 ± 24.2 | 8.4 | 27.5 | 40.0 | 56.2 | 183.3 |
| NO2 (μg/m3) | 66.6 ± 24.9 | 13.6 | 50.2 | 62.5 | 79.2 | 253.7 |
| Meterologic measures | ||||||
| Mean temperature (°C) | 17.7 ± 8.5 | −2.4 | 10.3 | 18.3 | 24.7 | 34.0 |
| Relative humidlity (%) | 72.9 ± 11.4 | 33.3 | 65.5 | 73.5 | 81.0 | 97.0 |
a
Twenty-four-hour average for PM10, SO2, and NO2; 8-hr (1000 hr to 1800 hr) average for O3.