Table 3.
Descriptive statistics of daily air pollution levels and daily respiratory disease hospital admissions in two air pollution periods (in selected months).
| Air Pollution Period | Minimum | Mean (SD) | Maximum | p Value * | |
|---|---|---|---|---|---|
| PM2.5 (µg/m3) | Low | 10.48 | 25.31 (5.38) | 40.04 | <0.0001 |
| High | 18.73 | 48.77 (14.87) | 93.69 | ||
| PM10 (µg/m3) | Low | 11.28 | 27.74 (5.94) | 44.49 | <0.0001 |
| High | 20.81 | 54.97 (17.13) | 107.46 | ||
| Temperature (°C) | Low | 22.21 | 26.36 (1.64) | 29.98 | <0.0001 |
| High | 24.80 | 28.66 (1.33) | 30.84 | ||
| Humidity (%) |
Low | 64.88 | 80.07 (6.80) | 97.32 | <0.0001 |
| High | 48.80 | 68.20 (7.98) | 85.51 | ||
| All | Low | 12 | 26.97 (7.14) | 46 | <0.0001 |
| High | 13 | 32.73 (9.07) | 54 | ||
| Male | Low | 3 | 14.02 (4.88) | 31 | <0.0001 |
| High | 9 | 18.09 (5.15) | 36 | ||
| Female | Low | 3 | 12.94 (3.86) | 26 | 0.07 |
| High | 2 | 14.64 (5.81) | 31 | ||
| ≤64 years | Low | 7 | 17.62 (5.16) | 37 | 0.004 |
| High | 9 | 20.51 (6.69) | 38 | ||
| 65+ years | Low | 2 | 9.34 (3.82) | 20 | <0.0001 |
| High | 4 | 12.22 (3.96) | 24 | ||
| Pneumonia | Low | 0 | 1.53 (0.69) | 3 | 0.6561 |
| High | 0 | 1.61(0.76) | 4 | ||
| COPD | Low | 0 | 5.90 (2.75) | 14 | <0.0001 |
| High | 2 | 7.86 (3.26) | 17 | ||
| Asthma | Low | 1 | 5.93 (2.52) | 15 | 0.5948 |
| High | 0 | 6.28 (2.93) | 15 |
* Welch’s test results.