Table 1.
Summary statistics on air pollution and meteorological exposure on outpatient day for acute glaucoma attack throughout the study period
| Variables | Mean ± standard deviation | Min | 25th percentile | 50th percentile | 75th percentile | Max |
|---|---|---|---|---|---|---|
| SO2 (μg/m3) | 7.0 ± 3.8 | 1 | 4.7 | 6.2 | 8.4 | 60.2 |
| NO2 (μg/m3) | 40.5 ± 19.3 | 1.7 | 26.8 | 36.8 | 50.3 | 158.4 |
| CO (mg/m3) | 0.7 ± 0.3 | 0.1 | 0.5 | 0.7 | 0.8 | 2.3 |
| O3 (μg/m3) | 92.3 ± 43.4 | 1.4 | 60.9 | 86.1 | 116.8 | 304.8 |
| PM10 (μg/m3) | 47.3 ± 29.5 | 5.5 | 29.4 | 40 | 58 | 494.3 |
| PM2.5 (μg/m3) | 32.3 ± 21.3 | 2.6 | 17.1 | 26.4 | 41.2 | 107.7 |
| Temperature (°C) | 18.4 ± 8.3 | −4.7 | 10.9 | 18.9 | 25.6 | 35.3 |
| Humidity (%) | 75.4 ± 13.6 | 32.5 | 66.4 | 75.9 | 85.5 | 100 |
Abbreviations: PM2.5 particulate matter with an aerodynamic diameter less than 2.5 μm, PM10 particulate matter with an aerodynamic diameter < 10 μm, SO2 sulfur dioxide; NO2 nitrogen dioxide, CO carbon monoxide; O3 ozone