| Authors | RS/RD | Exposure (Pollutants) | OR (95% CI) |
| Kim et al. | Bronchitis | ||
| NOx | 1.05 (1.01, 1.08) | ||
| NO | 1.05 (1.02, 1.09) | ||
| Schikowski et al. | Chronic bronchitis by physician diagnosis | ||
| NO2 [16 µg/m3] | 1.25 (1.00 - 1.58) | ||
| Frequent cough |
|
| |
| NO2 [16 µg/m3] | 1.13 (1.01 - 1.27) | ||
| COPD |
|
| |
| NO2 [16 µg/m3] | 1.39 (1.20 - 1. 63) | ||
| PM10 [7 µg/m3] | 1.33 (1.03 - 1.72) | ||
| Janseens et al. | Hay fever ever |
|
|
| PM2.5 | 2.28 (1.13 - 4.57) |