Table 1 Characteristics (mean ± SD) of the individuals studied
Non-smokers | Smokers | COPD | P value | |
|---|---|---|---|---|
N = 12 | N = 15 | N = 44 | ||
Age (years) | 67.8 ± 9.3 | 61.4 ± 12.0 | 65.9 ± 7.6 | 0.18 |
Females/Males | 10/2 | 5/10 | 9/35 | 0.0002 |
BMI (Kg/m2) | 28.5 ± 6.6 | 27.7 ± 4.6 | 25.7 ± 3.9 | 0.41 |
Current/Former smokers | 0/0 | 9/6 | 27/17 | 0.99 |
Cumulative smoking exposure (packs-year) | 0 ± 0 | 36.3 ± 24.8 | 49.9 ± 20.1 | 0.01 |
FEV1/FVC (%) | 77.9 ± 4.0 | 77.3 ± 7.5 | 59.5.0 ± 7.3 | < 0.001 |
FEV1 (% reference) | 97.5 ± 8.1 | 95.3 ± 9.4 | 75.0 ± 15.6 | < 0.001 |