Table 1.
Summary statistics of daily death numbers, air pollution levels, and weather conditions in Shenyang, China.
| Variable | Mean ± SD | Minimum | Maximum | IQR |
|---|---|---|---|---|
| Daily deaths (n) | ||||
| All natural causes | 67 ± 10 | 41 | 113 | 14 |
| Cardiovascular | 32 ± 7 | 15 | 76 | 9 |
| Respiratory | 7 ± 3 | 1 | 18 | 4 |
| Air pollutanta | ||||
| PNC0.25–10 | 11,000 ± 400 | 1,100 | 71,000 | 8,400 |
| PNC0.25–0.28 | 3,500 ± 2,700 | 380 | 16,000 | 2,600 |
| PNC0.28–0.30 | 2,700 ± 2,300 | 260 | 15,000 | 2,000 |
| PNC0.30–0.35 | 1,900 ± 1,800 | 170 | 13,000 | 1,510 |
| PNC0.35–0.40 | 1,100 ± 1,300 | 81 | 9,600 | 850 |
| PNC0.40–0.45 | 520 ± 810 | 28 | 6,400 | 360 |
| PNC0.45–0.50 | 290 ± 520 | 11 | 4,300 | 193 |
| PNC0.50–0.65 | 270 ± 21 | 9.2 | 4,300 | 188 |
| PNC0.65–1.0 | 110.0 ± 8.9 | 3.8 | 2,000 | 63 |
| PNC1.0–2.5 | 32.0 ± 3.5 | 1.0 | 1,900 | 22 |
| PNC2.5–10 | 9.40 ± 4.2 | 0.1 | 2,600 | 4 |
| PM2.5 | 95.9 ± 56.0 | 11.0 | 424.0 | 63.9 |
| PM2.5–10 | 48.0 ± 37.5 | 3.5 | 573.2 | 36.7 |
| PM10 | 142.5 ± 72.9 | 18.1 | 703.6 | 86.3 |
| SO2 | 55.2 ± 44.9 | 8.0 | 331.0 | 53.0 |
| NO2 | 35.3 ± 16.9 | 9.0 | 108.0 | 19.0 |
| Weather condition | ||||
| Temperature (°C) | 8.8 ± 12.3 | –18.0 | 27.0 | 23.0 |
| Humidity (%) | 65.2 ± 14.1 | 16.0 | 98.0 | 20.0 |
| aPNC are reported as particles/cm3, and mass concentrations of PM, SO2, and NO2 are reported as μg/m3. | ||||