Table 1.
Clinical and polysomnographic characteristics between OSA and control groups.
| OSA group | Control group | P | |
|---|---|---|---|
| Clinical factors | |||
| Subjects, No. | 38 | 41 | |
| Age, years, mean (SD) | 45.0 (6.6) | 37.2 (10.7) | 0.001 |
| Men, No. (%) | 38 (100) | 41 (100) | – |
| BMI, kg/m2, mean (SD) | 28.3 (4.0) | 24.0 (2.1) | <0.001 |
| ESS score, mean (SD) | 11.0 (4.5) | 4.5 (2.7) | <0.001 |
| BDI score, mean (SD) | 5.9 (6.3) | 2.9 (3.3) | 0.019 |
| BAI score, mean (SD) | 5.5 (5.7) | 4.3 (3.1) | 0.864 |
| Polysomnographic parameters | |||
| Time in bed, min, mean (SD) | 393.2 (67.8) | 425.5 (34.8) | 0.035 |
| Total sleep time, min, mean (SD) | 327.9 (65.9) | 383.5 (33.3) | <0.001 |
| Sleep latency, min, mean (SD) | 8.3 (10.2) | 8.5 (7.4) | 0.462 |
| REM sleep latency, min, mean (SD) | 89.4 (52.0) | 79.4 (31.5) | 0.471 |
| Sleep efficiency, %, mean (SD) | 81.5 (15.2) | 90.2 (3.7) | <0.001 |
| Arousal index, events/h, mean (SD) | 50.0 (20.0) | 12.8 (3.2) | <0.001 |
| WASO, min | 57.6 (38.0) | 40.6 (26.3) | 0.008 |
| N1 sleep, %, mean (SD) | 37.6 (16.2) | 12.4 (4.7) | <0.001 |
| N2 sleep, %, mean (SD) | 41.5 (12.8) | 53.2 (6.0) | <0.001 |
| N3 sleep, %, mean (SD) | 3.1 (4.8) | 10.7 (3.6) | <0.001 |
| REM sleep, %, mean (SD) | 17.7 (6.6) | 23.8 (5.4) | <0.001 |
| AHI, events/h, mean (SD) | 56.8 (26.2) | 2.3 (2.2) | <0.001 |
| PLM index, events/h, mean (SD) | 3.7 (5.7) | 2.7 (4.8) | 0.818 |
| Movement arousal index, events/h, mean (SD) | 0.3 (0.8) | 0.8 (1.2) | 0.007 |
| Lowest saturation of oxygen, % | 75.3 (9.4) | 92.7 (2.7) | <0.001 |
| Oxygen desaturation index, events/h, mean (SD) | 50.2 (26.8) | 0.4 (0.9) | <0.001 |
OSA, obstructive sleep apnea; SD, standard deviation; BMI, body mass index; ESS, Epworth sleepiness scale; BDI, Beck depression inventory; BAI, Beck anxiety inventory; WASO, wakefulness after sleep onset; AHI, apnea–hypopnea index; PLM, periodic limb movement. Bold values denote statistical significance at the p < 0.05 level.