Table 1.
Estimates of relative risk of mortality compared to matched unexposed days, as well as the resulting estimates of flood-associated excess deaths, among Beijing residents on the peak flood day (July 21, 2012) and the following day. For each point estimate, 95% confidence intervals are shown in parentheses.
| Relative risk on July 21, 2012 (peak flood day) | Relative risk on July 22, 2012 | Excess deaths on peak flood daya | Excess deaths on July 21–22, 2012b | |
|---|---|---|---|---|
| All-cause mortality | 1.34 (1.11, 1.61) | 1.11 (0.91, 1.35) | 59 (23, 89) | 79 (22, 125) |
| Circulatory mortality | 1.37 (1.01, 1.85) | 1.22 (0.90, 1.65) | 28 (1, 49) | 46 (6, 79) |
| Respiratory mortality | 0.94 (0.52, 1.72) | 0.64 (0.32, 1.28) | −1 (−14, 6) | −7 (−29, 5) |
| Accidental mortality | 4.40 (2.98, 6.51) | 1.49 (0.82, 2.71) | 24 (21, 26) | 28 (20, 32) |
a
Confidence intervals were calculated based on the uncertainty of estimated relative risk on the peak flood day.
b
Confidence intervals were calculated using Monte Carlo simulation (details in the Supplementary Material).