Table 1. Patient characteristics.
| Patients No. | Age (years) | FEV1 (%pred) | FVC (%pred) | FEV1/FVC (%) | PImax (cmH2O) | pH | PaO2
(mmHg & kPa) |
PaCO2
(mmHg & kPa) |
PetCO2 (mmHg) | BMI (kg/m2) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 59 | 38 | 77 | 38.50 | 66.1 | 7.45 | 73.96 (9.86) | 36.38 (4.85) | 37.3 | 23.88 |
| 2 | 52 | 39 | 61 | 52.00 | 49.4 | 7.41 | 86.26 (11.50) | 34.28 (4.57) | 42.6 | 19.53 |
| 3 | 50 | 52 | 78 | 54.20 | 152.6 | 7.41 | 84.76 (11.30) | 40.13 (5.35) | 40.2 | 24.11 |
| 4 | 65 | 53 | 66 | 62.90 | 108.8 | 7.43 | 87.01 (11.60) | 29.18 (3.89) | 35.7 | 22.49 |
| 5 | 78 | 69 | 83 | 62.20 | 122.6 | 7.42 | 80.26 (10.70) | 37.05 (4.94) | 32.7 | 23.05 |
| 6 | 61 | 42 | 55 | 34.9 | 47.0 | 7.42 | 99.76 (13.30) | 38.93 (5.19) | 40.4 | 17.75 |
| 7 | 68 | 53 | 69 | 58.80 | 89.0 | 7.42 | 74.33 (9.91) | 35.70 (4.76) | 42.5 | 17.30 |
| 8 | 69 | 64 | 89 | 56.20 | 44.0 | 7.40 | 85.51 (11.40) | 38.18 (5.09) | 34.1 | 22.83 |
| 9 | 59 | 47 | 58 | 64.5 | 47.8 | 7.44 | 91.51 (12.20) | 37.28 (4.97) | 40.0 | 21.26 |
| 10 | 73 | 34 | 84 | 30.40 | 57.6 | 7.42 | 102.76 (13.70) | 35.25 (4.70) | 37.8 | 20.52 |
| 11 | 52 | 37 | 59 | 51.00 | 42.6 | 7.40 | 77.26 (10.30) | 44.03 (5.87) | 43.0 | 19.21 |
| 12 | 59 | 47 | 68 | 51.50 | 53.8 | 7.37 | 100.51 (13.40) | 40.58 (5.41) | 42.6 | 21.67 |
| 13 | 46 | 78 | 96 | 67.60 | 85.5 | 7.42 | 79.51 (10.60) | 37.73 (5.03) | 36.8 | 23.12 |
| 14 | 61 | 45 | 60 | 59.40 | 64.7 | 7.45 | 97.51 (13.00) | 37.43 (4.99) | 33.4 | 24.96 |
| 15 | 62 | 65 | 66 | 54.42 | 58.2 | 7.43 | 68.41 (9.12) | 38.78 (5.17) | 43.7 | 20.03 |
| 16 | 68 | 54 | 93 | 44.70 | 46.9 | 7.42 | 110.26 (14.7) | 40.95 (5.46) | 43.8 | 23.44 |
| 17 | 73 | 50 | 84 | 45.10 | 50.2 | 7.38 | 114.01 (15.20) | 41.85 (5.58) | 46.4 | 25.77 |
| 18 | 58 | 51 | 80 | 50.40 | 52.8 | 7.41 | 84.76 (11.30) | 39.45 (5.26) | 40.5 | 19.72 |
| 19 | 68 | 51 | 101 | 39.60 | 55.3 | 7.42 | 69.76 (9.30) | 37.58 (5.01) | 45.2 | 24.34 |
| Mean | 62.16 | 51.00 | 75.11 | 51.49 | 68.15 | 7.42 | 87.79 (11.70) | 37.93 (5.06) | 39.93 | 21.84 |
| SD | 8.53 | 11.51 | 13.97 | 10.40 | 30.31 | 0.02 | 13.26 (1.77) | 3.20 (0.43) | 4.07 | 2.44 |
FVC, forced vital capacity; FEV1, forced expiratory volume in 1 second; %pred, percent predicted; PImax, maximal inspiratory pressure; PaCO2, PaO2, arterial carbon dioxide and oxygen tensions; PetCO2, end tidal carbon dioxide pressure; BMI, body mass index.