Table 2 Summary statistics for daily number of COPD deaths, daily air pollutant concentrations and weather conditions in Guangzhou, China, 2007–2011.
From: The burden of COPD mortality due to ambient air pollution in Guangzhou, China
Variables | Mean ± SD | Minimum | Percentile | Maximum | ||
|---|---|---|---|---|---|---|
25th | 50th | 75th | ||||
Daily COPD deaths | 6 ± 3 | 0 | 4 | 5 | 7 | 22 |
PM10 (μg/m3) | 72.6 ± 37.7 | 7.6 | 45.4 | 65.1 | 91.1 | 295.8 |
SO2 (μg/m3) | 40.0 ± 27.4 | 2.4 | 20.0 | 34.3 | 52.6 | 198.5 |
NO2 (μg/m3) | 60.7 ± 27.0 | 17.6 | 41.1 | 53.9 | 73.4 | 213.3 |
Mean temperature (°C) | 22.5 ± 6.4 | 5.4 | 18.0 | 24.0 | 27.7 | 33.5 |
Mean humidity (%) | 71.8 ± 13.2 | 25.0 | 64.0 | 73.0 | 82.0 | 99.0 |
Mean pressure (hpa) | 10 077 ± 69 | 9 887 | 10 026 | 10 072 | 10 130 | 10 266 |
