Concentration-Response Relationship between PM2.5 and Daily Respiratory Deaths in China: A Systematic Review and Metaregression Analysis of Time-Series Studies
Table 2
Pooled risk estimates (percent increase in respiratory mortality [RM] per 10 g/m3 PM2.5).
Subgroup
% increase in RM (95% CI)
I2
Single-day lags
All
0.30 (0.10, 0.50)
84.1%
All (trim-and-fill)
0.12 (−0.06, 0.31)
47.8
Northern cities
0.24 (0.02, 0.46)
87.5%
Southern cities
0.46 (0.16, 0.76)
0.2%
Multiday lags
All
0.69 (0.55, 0.83)
0.0%
All (trim-and-fill)
0.66 (0.52, 0.79)
8.6
Northern cities
0.64 (0.49, 0.79)
0.0%
Southern cities
0.94 (0.60, 1.28)
0.0%
-effects model was used. -effects model was used. Q.