Table 3.
Relative risk and attributable fractions of daily total mortality associated with non-optimum ambient temperatures in 272 main Chinese cities, 2013-15, by climatic zone
| Climatic zone | Minimum mortality centile* | Minimum mortality temperature (°C) | Relative risk (95% CI)† | Attributable fraction (%; 95% eCI)‡ | ||||
|---|---|---|---|---|---|---|---|---|
| Extreme low | Extreme high | Overall | Cold | Heat | ||||
| Nationwide | 79.1 | 22.8 | 1.68 (1.57 to 1.81) | 1.16 (1.12 to 1.21) | 14.33 (13.06 to 15.14) | 11.62 (10.64 to 12.38) | 2.71 (1.98 to 2.98) | |
| Temperate monsoon | 72.1 | 22.7 | 1.52 (1.37 to 1.68) | 1.06 (1.03 to 1.09) | 17.41 (15.62 to 18.97) | 12.13 (10.89 to 13.26) | 5.28 (4.11 to 6.41) | |
| Subtropical monsoon | 82.5 | 22.5 | 1.33 (1.25 to 1.41) | 1.27 (1.17 to 1.38) | 13.04 (11.56 to 14.34) | 11.93 (10.68 to 13.11) | 1.11 (0.74 to 1.46) | |
| Temperate continental | 25.3 | −7.6 | 1.06 (0.83 to 1.36) | 1.77 (0.93 to 3.38) | 8.27 (−48.10 to 48.63) | 1.70 (−9.63 to 6.23) | 6.57 (−55.68 to 48.62) | |
| Alpine | 33.7 | −2.9 | 1.09 (0.89 to 1.34) | 1.21 (0.69 to 2.13) | 5.92 (−59.45 to 39.61) | 3.68 (−18.80 to 20.15) | 2.24 (−50.21 to 28.37) | |
| Tropical monsoon | 92.1 | 29.1 | 1.25 (0.86 to 1.81) | 1.04 (0.92 to 1.18) | 3.88 (−6.05 to 29.80) | 3.51 (−4.22 to 23.23) | 0.37 (−7.05 to 10.42) | |
*
Minimum mortality centile of temperature distributions.
†
Data presented as means and 95% confidence intervals. Extreme low=2.5th centile of temperature distribution (−1.4°C on average); extreme high=97.5th centile of temperature distribution (29.0°C on average).
‡
Data presented as the means and 95% empirical confidence intervals.