TABLE 3.
Within‐person fluctuations in daily negative mood as predictor of subjective and objective measures of sleep the same night
| Dependent variable | ||||
|---|---|---|---|---|
| Self‐reported sleep minutes | Self‐reported sleep/wake problems | Objective sleep minutes | Objective sleep efficiency | |
| Fixed effects | ||||
| b (SE), p | b (SE), p | b (SE), p | b (SE), p | |
| Intercept | 487.41 (6.50), p < .001 | 12.47 (0.18), p < .001 | 402.30 (486), p < .001 | 93.13 (0.44), p < .001 |
| Time | −4.17 (1.62), p = .011 | −0.10 (0.03), p = .002 | −1.12 (0.94), p = .24 | −0.01 (0.07), p = .89 |
| Weekend vs. weekday | 41.95 (7.42), p < .001 | −0.57 (0.15), p < .001 | 27.76 (4.71), p < .001 | −0.36 (0.33), p = .29 |
| Daily pain | −0.72 (8.77), p = .94 | 0.55 (0.22), p = .012 | −1.57 (6.50), p = .81 | −1.71 (0.54), p = .002 |
| Negative moodPC (within‐person) | 0.67 (4.91), p = .89 | 1.30 (0.15), p < .001 | 7.20 (3.62), p = .048 | 0.72 (0.30, p = .015 |
| Average negative mood (between‐person) | −7.87 (6.59), p = .23 | 2.17 (0.28), p < .001 | −3.03 (5.25), p = .56 | 0.05 (0.64), p = .94 |
| Sex | −14.00 (8.62), p = .11 | −0.17 (0.28), p = .55 | −24.09 (6.65), p < .001 | −1.68 (0.76), p = .028 |
| Race/ethnicity | −24.44 (8.84), p = .006 | −0.42 (0.32), p = .19 | −32.12 (7.65), p < .001 | −2.44 (0.87), p ‐ .005 |
| Income‐to‐needs ratio | −3.74 (2.34), p = .11 | 0.08 (0.10), p = .44 | 2.66 (1.77), p = .13 | 0.63 (0.19), p = .001 |
| Random effects (Variance estimates) | ||||
| Level 2 (Between‐person) | ||||
| Intercept | 5786.12 | 5.70*** | 3355.52** | 36.11 |
| Time | 130.05 | 0.02** | 19.17** | 0.13 |
| Weekend | 6724.45* | 2.10** | 1781.89*** | 4.58 |
| Pain | 3575.63 | 1.05* | 740.08* | 5.18 |
| Negative mood | 173.79 | 1.26 | 77.58 | 2.22 |
*
p < .05
**
p < .01
***
p < .001.
Note: Results from models with robust standard errors reported. Bold indicates a significant within‐person or between‐person association between negative mood and sleep. PC, person‐centered. Weekend coded 0 = weekday, 1 = weekend; Pain coded 0 = no, 1 = yes; Sex coded 0 = female, 1 = male; Race/ethnicity coded 0 = White/European American, 1 = racial/ethnic minority.