Table 3.
Linear mixed effects models for associations between sleep–wake regularity (ISsw), chronotype (MEQ), delayed bedtime, and mood (BDI)
| Model | BDI | ΔBDI | |||||
|---|---|---|---|---|---|---|---|
| b | 95% CI | P | b | 95% CI | P | ||
| 2a | Chronotype (MEQ) | −0.23 | (−0.41 to −0.05) | 0.012* | −0.03 | (−0.16 to 0.10) | 0.62 |
| 2b | Delayed-bedtime | 0.16 | (0.03 to 0.28) | 0.014* | 0.02 | (−0.07 to 0.11) | 0.68 |
| 2c | ISSW | −0.10 | (−0.18 to −0.01) | 0.022* | −0.08 | (−0.18 to −0.01) | 0.018* |
| Chronotype (MEQ) | −0.12 | (−0.31 to 0.06) | 0.18 | 0.02 | (−0.12 to 0.16) | 0.77 | |
| Delayed bedtime | 0.05 | (−0.08 to 0.25) | 0.43 | 0.05 | (−0.08 to −0.19) | 0.43 |
Linear mixed effects models showing the effects of chronotype (Model 2a), late-night duration (Model 2b) and both with ISsw included (Model 2d), on mood (BDI), and change in mood (ΔBDI). Adjusted for demographics, physical activity, and mean sleep duration.
ISsw = interdaily stability of sleep–wake times; HF sleep = high-frequency power during sleep; BDI = Beck Depression Inventory; ΔBDI = change in BDI.
*p < 0.05.