Table 2.

Two-level Multilevel Model of Demographic Characteristics, Sleep Disturbance, Life Events, and Chronic Illness on Depressive Symptoms (Model 1)

	Depressive mood
	Model 1		Model 2		Model 3
	B	(SE)	B	(SE)	B	(SE)
Fixed effects
Intercept, γ00	0.338***	(0.013)	0.141***	(0.013)	0.141***	(0.013)
Within-person covariatesa
Life events, γ10	—	—	0.006***	(0.001)	0.006***	(0.001)
Restless sleep, γ20	—	—	0.034***	(0.001)	0.034***	(0.001)
Life events * Restless Sleep, γ30	—	—	—	—	0.007**	(0.002)
Chronic illness, γ40	0.005***	(0.001)	0.003*	(0.001)	0.003*	(0.001)
Functional ability, γ50	−0.021***	(0.001)	−0.018***	(0.001)	−0.018***	(0.001)
Between-person covariatesb
Age, γ01	−0.001***	(0.000)	−0.001***	(0.000)	−0.001***	(0.000)
Gender, γ02	0.008**	(0.003)	0.005*	(0.002)	0.005*	(0.002)
Ethnicity, γ03	0.026***	(0.003)	0.025***	(0.003)	0.025***	(0.003)
Education, γ04	−0.005***	(0.001)	−0.004***	(0.000)	−0.004***	(0.000)
Chronic illness, γ05	0.011***	(0.002)	0.003*	(0.001)	0.003	(0.002)
Functional ability, γ06	−0.039***	(0.002)	−0.026***	(0.002)	−0.026***	(0.002)
Life events, γ07	—	—	0.016***	(0.002)	0.016***	(0.002)
Restless sleep, γ08	—	—	0.068***	(0.002)	0.068***	(0.002)
Random effects
Intercept, ${\sigma }_{u0}^2$	0.003***	(0.000)	0.002***	(0.000)	0.002***	(0.000)
Residual, ${\sigma }_{e1}^2$	0.006***	(0.000)	0.005***	(0.000)	0.005***	(0.000)
−2 Log likelihood	−21355.1		−22735.8.2		−22736.0

Notes. All models adjust for a wave indicator variable where w = 1–4. Step 1: Participant N = 3,605, Observation N = 11,833; Steps 2 and 3: Participant N = 3,597, Observation N = 11,791.

^aPerson-mean centered scores (i.e., time-varying).

^bPerson-mean across waves (i.e., time-invariant).

*p < .05. **p < .01. ***p < .001.