Table 5.
PSG and Sleep Disorder Predictors of the Difference Between ActiLife Actigraphy TST With a Sleep Diary and PSG TST (Actigraphy-PSG, Hours)
| Univariable | Multivariable | |||
|---|---|---|---|---|
| Characteristic | Beta (95% CI)a | P-value | Beta (95% CI)a | P-value |
| (Intercept) | −0.45 (−0.51, −0.38) | <0.001 | ||
| Actigraphy TST (mean-centered), hours | 0.3 (0.23, 0.37) | <0.001 | 0.57 (0.43, 0.51) | <0.001 |
| PSG SOL, hours | 1.2 (1.0, 1.3) | <0.001 | 0.81 (0.72, 0.90) | <0.001 |
| PSG WASO, hours | 0.8 (0.74, 0.86) | <0.001 | 0.79 (0.75,0.84) | <0.001 |
| AHI, per 10 events/hour | 0.06 (0.02, 0.09) | 0.002 | — | — |
| Arousal index, events/hour | 0.01 (0.00, 0.01) | <0.001 | — | — |
| Insomnia symptoms | −0.02 (−0.18, 0.14) | 0.8 | — | — |
| Daytime sleepiness (ESS) | −0.02 (−0.03, 0.00) | 0.045 | — | — |
| PSG 3% Oxygen desaturation index, desaturations/hour | 0 (0.00, 0.01) | 0.02 | — | — |
aCI, Confidence Interval.
Multivariable model: R2/R2 adjusted = 0.726/ 0.725.
Variables were not in the multivariable model due to nonsignificance (AHI, insomnia, p > 0.05) or multicollinearity (sleep efficiency, arousal index, and 3% oxygen desaturation index).