Table 3.
Predictors of specific polysomnography measures (n = 96).
| Sleep efficiency β (SE) | Stage 2 sleep β (SE) | Stage 4 sleep β (SE) | Stage REM sleep β (SE) | REM duration β (SE) | |
|---|---|---|---|---|---|
| Age | −.15 (.18) | 0.89 (0.56) | −0.39 (0.42) | 0.22 (0.25) | 1.18 (1.38) |
| Sex (female) | 0.74 (0.53) | 1.37 (1.66) | 1.40 (1.25) | −1.53 (0.75)* | −12.11 (4.03)*** |
| Ethnicity (African-American) | −0.66 (0.27)* | 2.41 (0.84)*** | −1.30 (0.63)* | −1.26 (0.38)**** | −5.72 (2.03)** |
| Socioeconomic statusa | −0.00 (0.03) | 0.00 (0.08) | −0.04 (0.06) | −0.01 (0.04) | −0.09 (0.20) |
| Depression in the parent | −1.45 (0.57)* | −1.46 (1.77) | 1.89 (1.33) | 2.66 (0.80)**** | 14.25 (4.30)**** |
| Depression severity (HDRS) | −.11 (0.20) | 0.28 (0.63) | −0.14 (0.47) | 0.21 (0.29) | 1.46 (1.53) |
| Depression severity (BDI) | −0.22 (0.11) | 0.09 (0.34) | −0.30 (0.25) | 0.09 (0.15) | 0.28 (0.82) |
| Global function (CGAS)a | 0.03 (.03) | −0.14 (0.08) | 0.19 (0.06)** | 0.06 (0.04) | 0.26 (0.20) |
| Chronic stress | −0.02 (0.06) | 0.07 (0.19) | −0.13 (0.14) | −0.06 (0.09) | −0.50 (0.45) |
| Episodic stress | −0.05 (0.09) | 0.05 (0.29) | −0.48 (0.22)* | 0.05 (0.13) | 0.73 (0.70) |
SE = standard error; HDRS = Hamilton Depression Rating Scale; BDI = Beck Depression Inventory; CGAS = Children’s Global Assessment Scale.
Sleep efficiency: R2 = .17, F = 1.73, df = 10, p ≤ .10; Stage 2 sleep: R2 = .17, F = 1.68, df = 10, p ≤ .10; Stage 4 sleep = R2 = .22, F = 2.38, df = 10, p ≤ .05; Stage REM sleep: R2 = .28, F = 3.34, df = 10, p ≤ .001; REM duration: R2 = .29, F = 3.49, df = 10, p ≤ .001.
a
Higher score is associated with higher socioeconomic status or better psychosocial function.
*
p ≤ .05.
**
p ≤ .01.
***
p ≤ .005.
****
p ≤ .001.