From: Assessing the short term impact of air pollution on mortality: a matching approach
Mean/Proportion | Standardized differenced | |||||
---|---|---|---|---|---|---|
Background characteristic | Treated (n = 812) | Controls (n = 649) | Matched Controls (n = 649) | Pre-matching | Post-matching | % Biase |
Estimated propensity score | 0.756 | 0.306 | 0.756 | 1.810 | 0 | 100.0 |
Temperature (°C)a | 11.4 | 18.3 | 11.3 | 0.914 | 0.013 | 98.5 |
Relative humidity (%) | 66.8 | 58.6 | 67.1 | 0.456 | 0.014 | 97.0 |
Saturdays and Sunday | 0.243 | 0.341 | 0.195 | 0.217 | 0.106 | 51.0 |
Day of year | - | - | - | 405.5c | 15.9c | 96.1f |
Influenza epidemics | 0.128 | 0.009 | 0.054 | 0.483 | 0.315 | 34.7 |
Heat episodesb | 0.032 | 0.028 | 0.025 | 0.001 | 0.002 | −77.8 |
Summer days | 0.225 | 0.664 | 0.252 | 0.037 | 0.002 | 93.8 |