Table 3.
Covariates associated with improvement in sleep depth on PAP*
| Variables | Type 1,1 | Type 1,2 | Type 1,3 |
|---|---|---|---|
| Number of observations | 60 | 111 | 224 |
| Intercept | 0.060 (NS) | 0.825 (p = 0.04) | −0.847 (p = 0.07) |
| Age (years) | 0.004 (p = 0.004) | ||
| Gender (Male = 0, Female = 1) | −0.073 (p = 0.05) | ||
| BMI (Kg/M2) | 0.004 (p = 0.02) | ||
| AHI (hr−1) | −0.003 (p = 0.0002) | −0.002 (p = 0.01) | −0.004 (p < 0.00001) |
| Arousal/Awakening index (hr−1) | −0.003 (p = 0.004) | −0.005 (p < 0.00001) | |
| ORPWAKE | 0.285 (p = 0.02) | −0.459 (p = 0.01) | 0.558 (p = 0.01) |
| ORPNREM | −0.372 (p = 0.01) | −0.408 (p < 0.00001) | |
| ORP < 0.5 (% TRT) | 0.022 (p = 0.004) | ||
| ORP > 2.25 (%TRT) | −0.038 (p = 0.09) | −0.004 (p = 0.01) | |
| Epworth sleepiness scale | |||
| Overall significance | r 2 = 0.65 | r 2 = 0.57 | r 2 = 0.47 |
*Results are from split studies; Values are the coefficients with their level of significance; PAP, positive airway pressure; ORP, odds ratio product; AHI, apnea-hypopnea index; TRT, total recording time; BMI, body mass index.