Table 2.
Objective and subjective sleep quality parameters and residual AHI with O-PAP and CPAP under a pressure corresponding to 70% of the optimal CPAP pressure.
| CPAP | O-PAP | p | |
|---|---|---|---|
| Arousal index (/h) | 32.5 [23.7–44.4] | 28.1 [22.5–34.7] | 0.296 |
| Respiratory arousals index (/h) | 16.2 [11.0–21.2] | 11.5 [5.4–20.8] | 0.104 |
| Sleep timea (min) | 356.6 [232.8–390.2] | 336.6 [234.5–361.0] | 0.325 |
| Sleep efficiency (%) | 90.0 [78.0–92.5] | 88.1 [71.9–92.6] | 0.542 |
| Sleep quality VAS (mm) | 78.8 [60.6–85.7] | 75.5 [57.4–85.4] | 0.695 |
| AHI (/h) | 20.5 [13.7–28.9] | 14.3 [8.5–25.8] | 0.194 |
| AHI supine (/h) | 36.9 [24.0–58.4] | 23.6 [11.5–66.8] | 0.432 |
| AHI non-supine (/h) | 11.7 [4.5–16.9] | 12.3 [4.4–21.9] | 0.966 |
| AHI in REM sleep (/h) | 7.9 [5.2–13.6] | 12.6 [9.1–26.7] | 0.426 |
| AHI in NREM sleep (/h) | 22.4 [13.7–30.9] | 13.2 [8.2–22.2] | 0.104 |
| ODI ≥3% (/h) | 16.2 [9.9–35.6] | 12.7 [9.4–22.1] | 0.583 |
aSleep time does not include titration.
REM, rapid eye movement sleep; NREM, non-rapid eye movement sleep; VAS, visual analog scale.
Maximum score 100 mm. Higher score indicates better sleep quality.
Results are expressed as median and interquartile range.