Table 5. Modifying effect of temperature and relative humidity level on years of life lost and daily number of deaths for a 10-μg/m3 increment of pollutants*.
| Outcome & Pollutant | Total | High temperature and high humidity | High temperature and low humidity | Low temperature and high humidity | Low temperature and low humidity |
|---|---|---|---|---|---|
| Increase of years of life lost (95% CI) | |||||
| PM10 | 4.27 (1.17 to 7.38) | 0.66 (−8.85 to 10.17) | 16.51 (7.94 to 25.07) | 3.08 (−3.38 to 9.22) | 4.82 (−1.14 to 10.79) |
| PM2.5 | 2.97 (−2.01 to 7.95) | 1.08 (−13.44 to 15.60) | 12.10 (−1.96 to 26.16) | 8.98 (−2.06 to 20.03) | 3.00 (−7.02 to 13.03) |
| SO2 | 29.98 (19.21 to 40.76) | 21.52 (−32.45 to 75.49) | 48.29 (5.83 to 90.75) | 39.56 (18.34 to 60.78) | 26.56 (7.97 to 45.15) |
| NO2 | 16.58 (8.19 to 24.97) | 28.63 (4.82 to 52.44) | 40.49 (16.33 to 64.66) | 23.99 (7.65 to 40.33) | 20.37 (4.87 to 35.87) |
| Percentage increase in death (95% CI) | |||||
| PM10 | 0.53 (0.29 to 0.76) | 0.89 (0.04 to 1.75) | 1.78 (1.06 to 2.50) | 0.49 (0.00 to 0.98) | 0.81 (0.32 to 1.30) |
| PM2.5 | 0.57 (0.20 to 0.95) | 1.14 (−0.14 to 2.43) | 1.78 (0.61 to 2.96) | 1.28 (0.46 to 2.11) | 0.41 (−0.43 to 1.27) |
| SO2 | 2.89 (2.04 to 3.76) | 7.23 (2.44 to 12.23) | 6.01 (2.34 to 9.81) | 4.16 (2.59 to 5.75) | 3.07 (1.59 to 4.56) |
| NO2 | 1.65 (1.01 to 2.30) | 3.12 (0.95 to 5.34) | 4.04 (1.98 to 6.15) | 2.73 (1.51 to 3.96) | 2.43 (1.16 to 3.71) |
*The analyses are adjusted for seasonality, day of the week, air pressure and wind speed. The analyses for PM2.5 were based on data collected from 2011 to 2013 only.