Characteristics of subjects
| Young | Older | ||||||
|---|---|---|---|---|---|---|---|
| Non-smokers | Current smokers | Non-smokers | Former smokers | Current smokers | |||
| No emphysema | Emphysema | No emphysema | Emphysema | ||||
| VC, vital capacity; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity. | |||||||
| Data are expressed as mean (SE). | |||||||
| *Significantly different from older non-smokers (p<0.05). | |||||||
| †Significantly different from older former smokers without emphysema (p<0.05). | |||||||
| ‡Significantly different from older current smokers without emphysema (p<0.05). | |||||||
| No of subjects | 16 | 23 | 7 | 7 | 10 | 21 | 25 |
| Age (years) | 23 (1) | 23 (0) | 63 (3) | 65 (2) | 59 (3) | 57 (2) | 61 (2) |
| Cigarettes/day | 0 | 20 (1) | 0 | 0 | 0 | 27 (5) | 25 (4) |
| Pack-years | 0 | 5 (1) | 0 | 35 (10) | 41 (7) | 55 (5) | 45 (4) |
| VC (% pred) | 97 (3) | 96 (3) | 122 (8) | 125 (3) | 110 (3)† | 110 (4) | 110 (4) |
| FEV1 (% pred) | 83 (3) | 88 (3) | 124 (8) | 129 (5) | 97 (5)† | 101 (5) | 92 (4)‡ |
| FEV1/FVC (%) | 91 (2) | 88 (2) | 84 (2) | 80 (2) | 73 (3)* | 79 (2) | 70 (2)*‡ |