Characteristics of normal subjects and patients with COPD
| Age (years) | BMI | VC (% pred) | FEV1 (% pred) | FEV1/VC (%) | Pao2/Fio2* | Paco2* (kPa) | pH* | |
|---|---|---|---|---|---|---|---|---|
| BMI=body mass index; VC=vital capacity; FEV1=forced expiratory volume in 1 s; Pao2=arterial oxygen tension; Fio2=fractional concentration of inspired oxygen. *Data obtained during spontaneous breathing just before the study. | ||||||||
| Normal subjects | ||||||||
| 1 | 40 | 24.7 | 109 | 108 | 80 | |||
| 2 | 39 | 23.6 | 96 | 95 | 78 | |||
| 3 | 35 | 21.8 | 103 | 103 | 83 | |||
| 4 | 42 | 24.5 | 97 | 99 | 82 | |||
| COPD patients | ||||||||
| 5 | 67 | 22.7 | 57 | 26 | 35 | 250 | 9.2 | 7.32 |
| 6 | 75 | 25.9 | 50 | 41 | 47 | 221 | 9.3 | 7.33 |
| 7 | 65 | 27.0 | 68 | 38 | 43 | 207 | 9.8 | 7.30 |
| 8 | 64 | 22.8 | 81 | 39 | 37 | 250 | 9.0 | 7.33 |
| 9 | 76 | 22.9 | 33 | 20 | 38 | 203 | 9.6 | 7.31 |
| 10 | 73 | 24.8 | 67 | 42 | 42 | 161 | 10.4 | 7.32 |