Table 1.
Baseline characteristics of the patients at the inclusion visit
| Average (n=1,212) | |
|---|---|
| Age (years) | 66.4 (9.7) |
| Male sex (n) | 955 (78.8) |
| Current smokers (n) | 318 (26.2) |
| Tobacco history (pack-years) | 36.3 (20.8) |
| Body mass index (kg/m2) | 27.7 (4.1) |
| Comorbidities (Charlson comorbidity index) | 1.6 (1.5) |
| Dyspnea (MRC) | 1.5 (0.8) |
| Chronic sputum production (n) | 876 (72.3) |
| Exacerbations in the previous year (n) | 2.3 (1.9) |
| Spirometry: FVC (%) | 74.5 (19.5) |
| Spirometry: FEV1 (%) | 61.6 (20.2) |
Note: Data expressed as mean (standard deviation) or absolute (relative) frequencies depending on the nature of the variable.
Abbreviations: FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; MRC, modified Medical Research Council scale.