Table 2.
Linear mixed model analyses for the effect of condition (control vs. intervention) on sleep and cognitive outcomes (analyzed separately for each outcome).
| Respective outcome | β | SE | p-value |
|---|---|---|---|
| Episodic memory | −0.05 | 0.18 | 0.776 |
| Attention | −0.02 | 0.19 | 0.926 |
| Executive function | −0.03 | 0.14 | 0.836 |
| Total sleep time (hours) | 0.10 | 0.20 | 0.617 |
| Number of awakenings | 1.43 | 0.83 | 0.091 |
| Sleep onset latency (mins) | −3.47 | 2.73 | 0.210 |
| Sleep efficiency (%) | 0.39 | 0.95 | 0.686 |
| REM sleep (%) | −0.44 | 1.50 | 0.772 |
| Light sleep (%) | 1.53 | 1.81 | 0.402 |
| Deep sleep (%) | −0.88 | 0.95 | 0.361 |
β, Unstandardized Regression Coefficient; SE, Standard Error; REM, Rapid Eye Movement. Control condition used as reference group. Age, sex, baseline fitness and standard deviation of the respective sleep variable used as covariates in all models.