Table 2.
Pollutant concentrations by season and sampling location.
| Pollutant | Indoor | Mean (Range) | Outdoor | Mean (Range) | I vs. O * |
|---|---|---|---|---|---|
| n | n | (p-Value) | |||
| PM2.5 (μg/m3) | 39 | 20.0 (5.7–55.4) | 42 | 16.9 (8.5–40.5) | 0.14 |
| Summer | 20 | 20.8 (5.7–32.8) | 19 | 20.2 (11.2–40.5) | 0.47 |
| Winter | 19 | 19.2 (9.1–55.4) | 23 | 14.3 (8.5–21.5) | 0.23 |
| S vs. W * | (p-value) | 0.21 | <0.001 | ||
| BC (μg/m3) | 39 | 7.6 (3.5–21.1) | 35 | 8.1 (3.6–19.3) | 0.15 |
| Summer | 21 | 9.0 (4.9–21.08) | 16 | 9.3 (4.1–19.3) | 0.30 |
| Winter | 18 | 5.9 (3.5–10.3) | 19 | 7.0 (3.6–15.1) | 0.46 |
| S vs. W * | (p-value) | 0.01 | <0.01 | ||
| NO2 (ppb) | 34 | 7.3 (2.4–14.61) | 36 | 7.5 (4.2–14.0) | 0.69 |
| Summer | 16 | 8.5 (5.4–14.6) | 15 | 8.1 (4.7–14.0) | 0.45 |
| Winter | 18 | 6.2 (2.4–10.7) | 21 | 7.1 (4.2–11.6) | 0.26 |
| S vs. W * | (p-value) | <0.001 | 0.08 |
Notes: * Wilcoxon signed-rank test used to test differences between indoor and outdoor (I vs. O) and summer and winter (S vs. W) values.