Table 1 Characteristics of the study group and morphological data of the specimens studied
| Â | Normal (n=12) | Moderate degree of microscopical emphysema (n=27) | High degree of microscopical emphysema (n=30) |
|---|---|---|---|
Study group | |||
 Age (year) | 60±9 | 61±8 | 65±6 |
 Pack years | 29±9 | 38±20 | 39±21 |
 FEV1 (% pred.) | 74±15 | 82±19 | 77±17 |
 FEV1/VC (% pred.) | 82±1 | 91±1 | 78±2 |
 Kco (% pred.) | 81±26 | 82±22 | 75±19 |
 TLC (% pred.) | 93±23 | 95±17 | 102±13 |
 RV/TLC (% pred.) | 105±21 | 106±21 | 108±18 |
Morphological data specimens | |||
 DI (%) | 25±10 | 58±8 | 83±7 |
 MLI (μm) | 290±41 | 319±43 | 394±55 |
 PG (%) | 31±11 | 57±9 | 78±8 |