Table 3.
Developmental Trajectories by Sleep Dimension
| Weekday Sleep | Weekend Sleep | Nightly Variability (mins.) |
|||||
|---|---|---|---|---|---|---|---|
| Parameter | Duration (hrs.) |
Efficiency (%) |
Latency (mins.) |
Duration (hrs.) |
Efficiency (%) |
Latency (mins.) |
|
| b (SE) | b (SE) | b (SE) | b (SE) | b (SE) | b (SE) | b (SE) | |
| Intercept | 7.43 (0.11)*** | 95.51 (0.40)*** | 9.71 (1.18)*** | 7.54 (0.15)*** | 94.69 (0.66)*** | 12.14 (1.63)*** | 52.65 (3.11)*** |
| Year | −0.07 (0.03) | −0.38 (0.09)*** | −1.77 (0.75)* | −0.09 (0.03)* | −0.09 (0.18) | −0.68 (0.36) | 1.79 (0.80)* |
| Year2 | 0.46 (0.15)** | ||||||
| Sex | 0.38 (0.10)*** | 2.07 (0.34)*** | −1.33 (0.95) | 0.42 (0.13)** | 2.03 (0.42)*** | −2.14 (1.37) | 4.01 (2.59) |
| Parent Ed. | −0.02 (0.03) | 0.06 (0.10) | −0.45 (0.27) | −0.08 (0.04)* | 0.12 (0.12) | −0.87 (0.39)* | −0.97 (0.74) |
| Asian | −0.41 (0.14)** | 0.62 (0.50) | 1.89 (1.38) | −0.32 (0.19) | 0.29 (0.61) | 2.53 (1.97) | 5.63 (3.76) |
| Latino | −0.23 (0.12) | −0.32 (0.43) | 2.33 (1.18)* | −0.05 (0.16) | −0.23 (0.50) | 3.78 (1.66)* | −0.31 (3.17) |
| Other | 0.07 (0.21) | −0.20 (0.74) | 4.07 (2.08) | 0.53 (0.28) | −0.43 (0.88) | 4.65 (2.95) | −1.67 (5.52) |
Note.
*
p < .05,
**
p < .01,
***
p < .001.
Sex was coded as 0 = male and 1 = female, Parent Education was mean-centered, Ethnicity was dummy-coded with European American as the baseline, and Year was coded with 10th grade = 0 as the referent.