Means (SD) of data for the exercise tests with and without supplemental oxygen
| Air (n = 20) | Oxygen (n = 20) | ||||||
|---|---|---|---|---|---|---|---|
| Pre-exercise | Postexercise | Mean difference (CI) | Pre-exercise | Postexercise | Mean difference (CI) | ||
| Oxygen saturation (%) | 94.4 (2.0) | 88.8 (6.8) | −5.6 (−8.3, −2.9)3-150 | 97.8 (1.5) | 96.0 (2.5) | −1.8 (−2.6, −0.9) | |
| Po2 (kPa) | 9.8 (1.1) | 9.0 (1.9) | −0.8 (−1.4, −0.1)3-150 | 15.7 (3.1) | 14.8 (2.9) | −0.9 (−1.9, 0.1) | |
| Pco 2 (kPa) | 5.9 (0.9) | 6.2 (1.0) | 0.3 (0.1, 0.4)3-150 | 6.1 (0.9) | 6.4 (1.2) | 0.3 (0.1, 0.6)3-150 | |
| QTc dispersion (ms) (all patients) | 45.4 (17) | 43.8 (26) | −1.6 (−12.2, 8.9) | 52.6 (29) | 45.0 (17) | −7.6 (−18.8, 3.6) | |
| QTc dispersion (ms) | |||||||
| Desaturator (n = 11) | 43.2 (17) | 38.8 (19) | −4.4 (−17.4, 8.7) | 46.9 (29) | 45.2 (18) | −1.7 (−16.5, 13.0) | |
| Non-desaturator (n = 9) | 48.2 (18) | 49.9 (32) | 1.7 (−10.9, 14.2) | 59.6 (31) | 44.8 (16) | −14.8 (−29.4, 1.5) | |
Mean differences (95% confidence intervals (CI) for these differences) refer to the comparison of measurements taken before and immediately after exercise.
↵3-150 p < 0.05.
CI, 95% confidence intervals.