Variable | Young | Middle aged/elderly | |||
---|---|---|---|---|---|
 | Non-smokers | Smokers | Non-smokers | Smokers | COPD |
Number | 36 | 51 | 40 | 64 | 44 |
Age (yr) | 19.5 (0.8) | 20.0 (1.0) | 53.3 (8.8) | 52.1 (8.0) | 61.3 (8.5) |
Sex (F/M) | 2/34 | 1/50 | 28/12 | 24/40 | 9/35 |
Pack-years | - | 5.1 (2.3) | - | 30.4 (14.3) | 39.8 (15.0) |
BMI | 24.1 (2.5) | 24.1 (3.1) | 26.5 (4.2) | 27.7 (4.0) | 26.9 (3.8) |
Post- bronchodilator FVC (l) | 5.5 (0.8) | 5.5 (0.8) | 3.8 (0.8) | 4.0 (0.9) | 3.8 (0.9) |
FEV1 (l) | 4.8 (0.7) | 4.8 (0.7) | 3.2 (0.6) | 3.3 (0.7) | 2.3 (0.7) |
FEV1 (% predicted) | 97.3 (6.1) | 100.1 (9.5) | 104.7 (13.6) | 95.3 (12.2) | 70.0 (16.8) |
FEV1/FVC | 87.6 (5.6) | 87.1 (4.8) | 84.5 (5.9) | 82.7 (5.1) | 60.6 (9.3) |