Table 2 Summary statistics for daily counts of emergency room visits and exposure variables in Beijing, 2014–2015.
From: Short-term Effect of Ambient Ozone on Daily Emergency Room Visits in Beijing, China
Variable | Mean ± SD | Minimum | Percentile | Maximum | ||
|---|---|---|---|---|---|---|
25th | 50th | 75th | ||||
Emergency room visits | 9710 ± 1070 | 7,591 | 9,166 | 9,731 | 10,388 | 15,527 |
Ozone (μg/m3) | 103.1 ± 65.3 | 2 | 52 | 91 | 150 | 281 |
PM2.5 (μg/m3) | 74.6 ± 61.7 | 5.2 | 28.9 | 56.6 | 104.3 | 328.3 |
PM10 (μg/m3) | 97.9 ± 67.8 | 8.9 | 46.2 | 83.6 | 131.4 | 375.5 |
SO2 (μg/m3) | 11.7 ± 13.3 | 2.0 | 3.4 | 6.9 | 14.1 | 79.0 |
NO2 (μg/m3) | 48.2 ± 22.5 | 10.3 | 33.0 | 43.1 | 57.5 | 135.9 |
CO (mg/m3) | 1.15 ± 0.84 | 0.22 | 0.62 | 0.94 | 1.34 | 6.82 |
Temperature (°C) | 15.9 ± 10.4 | −5.9 | 6.0 | 18.5 | 25.3 | 32.6 |
Relative humidity (%) | 55 ± 20 | 8 | 41 | 56 | 70 | 99 |
