Changes in compliance and device metrics
| Before switch (CPAP/APAP) | After switch (bilevel PAP) | Difference | P value | |
| Average AHI | 4.9 (2.0, 11.8) | 4.0 (1.7, 9.2) | –0.9 | <0.001 |
| Average median leak, L/min | 5.0 (1.3, 11.3) | 4.1 (1.1, 10.4) | –0.9 | <0.001 |
| % Days with usage of ≥4 hours | 52.7 (14.3, 86.9) | 68.9 (27.8, 93.3) | +16.2 | <0.001 |
Values are median (IQR).
AHI, apnoea–hypopnoea index; APAP, automatic continuous positive airway pressure; CPAP, continuous positive airway pressure; PAP, positive airway pressure.