Table 2.
Polysomnographic parameters of OSA patients.
| Polysomnographic parameters | ESS ≥ 9 (n = 28) | ESS < 9 (n = 33) | p |
|---|---|---|---|
| TST, min | 421 (384.13, 456.43) | 426 (378.5, 505.75) | 0.45 |
| Sleep efficiency, % | 87.75 (83.88, 93.98) | 88.5 (78.35, 92.8) | 0.95 |
| NREM 1 sleep, % | 12.9 (8.725, 27.225) | 12.9 (6, 21.7) | 0.37 |
| NREM 2 sleep, % | 55.75 (42.175, 61.475) | 52.1 (42.3, 58.5) | 0.23 |
| NREM 3 sleep, % | 20.35 (17.575, 22.85) | 20.4 (16.2, 24.75) | 0.003 |
| REM Sleep, % | 5.95 (0, 16.275) | 12.7 (8.45, 19.85) | 0.50 |
| Arousal Index (Resp.), times·h−1 | 22.3 (6.1, 50.28) | 9.9 (3.8, 15.5) | 0.01 |
| Arousal Index (Spont.), times·h−1 | 5 (2.38, 7.7) | 5.9 (4.1, 9.95) | 0.10 |
| AHI, times·h−1 | 46.2 (27.85, 63.05) | 26.1 (13.55, 43.4) | 0.02 |
| ODI, times·h−1 | 48.8 (20.9, 64.8) | 22.2 (10.83, 42) | 0.01 |
| MinSaO2, % | 69 (58.25, 83.25) | 81 (74, 86) | 0.004 |
| TS90, % | 17.8 (2.03, 33.08) | 2.6 (0.5, 5.4) | 0.001 |
Values were expressed as median (interquartile range in brackets) or count (percentage). TST, total sleep time; ODI, oxygen desaturation index; AHI, apnoea-hypopnea index; MinSaO₂, Minimum pulse oxygen saturation; TS90, Proportion Time with SaO₂ < 90%; Resp., respiratory; Spont., spontaneous; NREM, non rapid eye movement; REM, rapid eye movement.