Table 1.
Demographics, Questionnaire Data, and Polysomnography Results (Randomized Controlled Trial)
| No-CPAP (N = 16) | CPAP (N = 15) | P Value | |
|---|---|---|---|
| Age, yr | 51.7 ± 3.7 | 47.5 ± 4.2 | 0.458 |
| Sex, F, n (%) | 3 (20.0) | 3 (21.4) | 0.928 |
| BMI, kg/m2 | 34.8 ± 1.9 | 33.8 ± 1.7 | 0.705 |
| BDI | 3.0 ± 1.0 | 3.4 ± 1.1 | 0.774 |
| WASI full scale | 201 ± 8.1 | 179.6 ± 10.2 | 0.109 |
| WASI percentile | 52.4 ± 7.9 | 43.4 ± 5.3 | 0.361 |
| Epworth sleepiness scale | 7.1 ± 1.1 | 7.8 ± 1.1 | 0.646 |
| Stanford sleepiness scale p.m. | 2.2 ± 0.4 | 2.6 ± 0.3 | 0.384 |
| Stanford sleepiness scale a.m. | 2.5 ± 0.3 | 3.3 ± 0.4 | 0.130 |
| TST, min | 382.9 ± 20.7 | 339.1 ± 22.5 | 0.164 |
| Sleep efficiency, % | 79.1 ± 3.8 | 74.2 ± 4.0 | 0.389 |
| WASO, min | 105.3 ± 20.4 | 154.3 ± 31.3 | 0.201 |
| N1, % | 10.6 ± 2.4 | 5.2 ± 1.3 | 0.060 |
| N2, % | 62.9 ± 3.3 | 61.4 ± 2.8 | 0.740 |
| N3, % | 7.2 ± 2.9 | 15.8 ± 2.8 | 0.036 |
| REM, % | 19.3 ± 1.8 | 17.6 ± 2.3 | 0.571 |
| Arousal index, events/h | 35.3 ± 7.7 | 18.2 ± 3.0 | 0.016 |
| AHI, events/h | 34.7 ± 7.5 | 3.6 ± 0.7 | 0.001 |
| Mean oxygen saturation, % | 92.2 ± 1.0 | 94.1 ± 0.5 | 0.127 |
| Oxygen nadir, % | 78.5 ± 2.3 | 88.1 ± 1.1 | 0.001 |
| PLMS index, events/h | 0.2 ± 0.1 | 0.7 ± 0.6 | 0.431 |
Definition of abbreviations: AHI = apnea–hypopnea index; BDI = Beck Depression Inventory; BMI = body mass index; CPAP = continuous positive airway pressure; PLMS = periodic limb movements of sleep; TST = total sleep time; WASI = Wechsler Abbreviated Scale of Intelligence; WASO = wake after sleep onset.
Values are presented as mean ± SEM. Bold type indicates statistical significance.