| Control | COPD | ||
---|---|---|---|---|
Pollution days | Clean air days | Pollution days | Clean air days | |
Symptoms | % (n) | % (n) | % (n) | % (n) |
Nasal congestion discharge | 50.0 (6) | 45.4 (5) | 68.8 (11) | 30.8 (4) |
Activity limitation | 25.0 (3) | 0.0 (0) | 62.5 (10) | 30.8 (4) |
Chest tightness | 33.3 (4) | 9.1 (1) | 43.8 (7) | 7.7 (1) |
Cough | 66.7 (8) | 36.4 (4) | 56.2 (9) | 15.4 (2) |
Shortness of breath | 41.7 (5) | 9.1 (1) | 62.5 (10) | 23.1 (3) |
Sputum thickness | 41.7 (5) | 9.1 (1) | 50.0 (8) | 15.4 (2) |
Sputum amount | 41.7 (5) | 18.2 (2) | 56.2 (9) | 30.8 (4) |
Wheeze | 0.0 (0) | 9.1 (1) | 37.5 (6) | 15.4 (2) |