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Demographic details of trial participants
| Age (years) | 53.80 (±9.65) |
| Male:female | 30:16 |
| FEV1% | 42.33 (±14.5) |
| FEV1/FVC ratio | 33.04 (±11.05) |
| Chronic bronchitis | 32 |
Note: Data shown as mean (±SD) or number.
Abbreviations: FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; SD, standard deviation.
