Table 3.

Within-Person Associations between Sleep and CRP

Variable	Actigraphy Duration		Actigraphy Variability		PSQI
	Weekday	Weekend	Nightly	Weekday/end	Quality
	b (SE)	b (SE)	b (SE)	b (SE)	b (SE)
Intercept	−1.67 (.20)***	−1.69 (.21)***	−1.70 (.20)***	−1.70 (.21)***	−1.64 (.19)***
Age	.16 (.04)***	.17 (.04)***	.17 (.04)***	.16 (.04)***	.16 (.03)***
Sex	.21 (.15)	.21 (.16)	.22 (.15)	.24 (.16)	.22 (.14)
Parental education	−.11 (.04)*	−.12 (.04)**	−.11 (.04)*	−.12 (.05)**	−.10 (.04)*
Asian	−.59 (.22)**	−.59 (.22)**	−.58 (.22)**	−.57 (.23)*	−.64 (.21)**
Latino	.10 (.19)	.05 (.19)	.09 (.18)	.08 (.20)	.07 (.17)
Other ethnicity	.06 (.32)	.11 (.33)	.06 (.32)	.19 (.34)	−.01 (.31)
Depressive symptoms	−.02 (.20)	−.04 (.22)	−.02 (.20)	−.22 (.23)	−.12 (.20)
Substance use	−.02 (.07)	−.05 (.07)	−.03 (.07)	−.07 (.08)	−.04 (.06)
Waist circumference	.02 (.01)	.02 (.01)	.02 (.01)	.02 (.01)	.03 (.01)**
Sleep	−.11 (.08)	−.08 (.06)	.01 (.16)	.20 (.08)*	.07 (.04)
Sleep × Age	.08 (.05)	.12 (.04)**	−.07 (.10)	.01 (.05)	.01 (.02)
Sleep × Parental edu	−.09 (.04)*	−.03 (.04)	.12 (.08)	.07 (.04)	.00 (.02)
Sleep × Asian	.35 (.23)	−.09 (.19)	−.47 (.49)	.10 (.22)	−.10 (.09)
Sleep × Latino	.14 (.20)	.03 (.15)	−.89 (.37)*	−.16 (.21)	−.01 (.07)
Sleep × Other ethnicity	.68 (.38)	.16 (.28)	−.90 (.72)	−.62 (.38)	−.14 (.14)

Note. Age was centered around 14.5 years (youngest age). Sex was coded as 0 = male and 1 = female. Parental education was grand-mean centered. Depressive symptoms, substance use, waist circumference and sleep variables were person-mean centered. Separate models were run for Sleep, Sleep × Age, Sleep × Parental Edu, and Sleep × Ethnicity. For simplicity, coefficients and standard errors for the intercept and covariates represent results from the models where Sleep was entered without the interaction terms.

^*p < .05,

^**p < .01,

^***p < .001.