Variable |
Normal (N=54) |
Low baseline oxygen (N=23) |
Abnormal (N=17) |
P-value |
Oxygen saturation level (%) |
96 (9597) |
94 (9296) |
95 (9396) |
< 0.001 |
Partial pressure of oxygen in arterial blood (%) |
72 (6579) |
64 (5867) |
66 (5873) |
0.021 |
Percent predicted total lung capacity (%) |
88 (76101) |
80 (6796) |
80 (6690) |
0.019 |
Percent predicted FEV1 (%) |
68 (5579) |
67 (4575) |
66 (5086) |
0.56 |
FEV1/FVC |
73 (6677) |
74 (6783) |
79 (7484) |
0.030 |
Percent predicted DLCO (%) |
67 (5781) |
55 (4572) |
56 (3772) |
0.045 |
- P-values result from Kendalls correlation coefficient tau or a Cochran-Armitage trend test. |