Study 1 (n=34) | Study 2 (n=18) | ||||
---|---|---|---|---|---|
Mean (SD) | Range | Mean (SD) | Range | p value* | |
FEV1=forced expiratory volume in 1 second; Pao2=arterial oxygen tension; Sao2=oxygen saturation. *Study 1 v study 2. | |||||
Age (years) | 68 (5.98) | 58–81 | 68 (6.87) | 58–81 | NS |
FEV1 (litres) | 0.88 (0.34) | 0.44–1.73 | 0.73 (0.17) | 0.44–1.10 | NS |
FEV1 (% predicted) | 34 (13.1) | 18–58 | 29 (6.1) | 19–40 | 0.045 |
Pao2 (kPa) resting, on air | 7.71 (1.45) (n=22) | 5.14–10.50 | 7.68 (1.37) (n=16) | 4.66–10.50 | NS |
Sao2 (%) resting, on air | 91.9 (5.2) | 76–97 | 90.5 (5.8) | 76–97 | NS |
Walk distance on air (m) | 283 (117.8) | 70–490 | 233 (88.6) | 90–410 | NS |