Table 2.
PM2.5 and O3 levels during the study period.
| Pollutant | Time Period | Statistic | 7-Day Average | 10-Day Average | 14-Day Average |
|---|---|---|---|---|---|
| PM2.5 (μg/m3) | All days (N = 69) | Mean (SD) | 11.6 (4.5) | 11.9 (4.3) | 11.9 (3.8) |
| Median (IQR) | 10.6 (4.9) | 10.9 (4.6) | 11.2 (4.4) | ||
| Range | (5.8, 25.3) | (6, 24.7) | (6, 23.5) | ||
| May–October (N = 33) | Mean (SD) | 10.7 (3.1) | 11.3 (2.8) | 11.6 (2.7) | |
| Median (IQR) | 10.7 (3.0) | 11.2 (3.4) | 11.4 (4.5) | ||
| Range | (6.1, 19.1) | (6.1, 17.8) | (6, 17) | ||
| November–April (N = 36) | Mean (SD) | 12.5 (5.5) | 12.5 (5.4) | 12.1 (4.6) | |
| Median (IQR) | 10.6 (6.7) | 10.2 (6.1) | 10.3 (5.4) | ||
| Range | (5.8, 25.3) | (6, 24.7) | (6.1, 23.5) | ||
| O3 (ppm) | All days (N = 69) | Mean (SD) | 0.04 (0.009) | 0.041 (0.008) | 0.041 (0.009) |
| Median (IQR) | 0.041 (0.014) | 0.042 (0.014) | 0.043 (0.014) | ||
| Range | (0.023, 0.058) | (0.023, 0.056) | (0.023, 0.055) | ||
| May–October (N = 33) | Mean (SD) | 0.044 (0.007) | 0.045 (0.007) | 0.046 (0.006) | |
| Median (IQR) | 0.044 (0.008) | 0.047 (0.008) | 0.048 (0.007) | ||
| Range | (0.026, 0.058) | (0.027, 0.056) | (0.032, 0.055) | ||
| November–April (N = 36) | Mean (SD) | 0.037 (0.008) | 0.037 (0.008) | 0.037 (0.008) | |
| Median (IQR) | 0.037 (0.012) | 0.036 (0.012) | 0.035 (0.013) | ||
| Range | (0.023, 0.052) | (0.023, 0.052) | (0.023, 0.052) |
7-, 10-, and 14-day average levels of PM2.5 and O3 occurring during the study period.