Functional indices of pulmonary function test, blood gas analyses, and spiroergometry during a constant 50 W workload
| Mean (SD) | |
| Lung function test: | |
| FEV1 (% predicted) | 77.5 (22.9) |
| FEV1/FVC (% predicted) | 85.2 (16.2) |
| TLC (% predicted) | 95.4 (11.1) |
| Rt (hPa×l−1×s) | 3.2 (1.5) |
| ITGV (% predicted) | 112.1 (24.6) |
| RV%TLC (% predicted) | 119.8 (25.2) |
| IVC (% predicted) | 89.5 (14.4) |
| TL co (% predicted) | 80.5 (4.7) |
| Blood gas analyses: | |
| PaO2, rest (mm Hg) | 76.6 (10.9) |
| PaO2, exercise (mm Hg) | 77.9 (11.1) |
| PaCO2, rest (mm Hg) | 37.9 (2.9) |
| PaCO2, exercise (mm Hg) | 37.8 (4.0) |
| Spiroergometry:2-150 | |
| HR (bpm) | 101.8 (12.4) |
| V˙E (l/min) | 31.7 (4.7) |
| V˙O2 (ml/kg/kg body weight) | 11.9 (1.8) |
| PETO2 (mm Hg) | 116.1 (7.4) |
| PETCO2 (mm Hg) | 36.7 (4.9) |
| Respiratory exchange ratio (RER) | 0.86 (0.08) |
| P(A-a)O2 (mm Hg) | 26.7 (11.2) |
| P(a-ET) CO2 (mm Hg) | 0.8 (4.0) |
| VD/VT (ratio) | 0.33 (0.05) |
| V˙E/V˙O2 (ratio) | 34.9 (8.1) |
| V˙E/V˙CO2 (ratio) | 39.9 (7.1) |
↵2-150 Data from 12/66 coal miners were not include in the analysis.