Table 3.

Two-Level Multilevel Models Predicting Minutes of Moderate to Vigorous Physical Activity from Sleep

		Sleep Onset Latency		Waketime After Sleep Onset		Sleep Quality Rating
Parameter	Symbol	Estimate	SE	Estimate	SE	Estimate	SE
Fixed Effects
Intercept	β 00	−.066	.050	−.075	.047	−.065	.050
Groupa	β 01	−.008	.053	−.021	.050	−.29E-4	.051
Ageb	β 02	.080	.055	.108	.054*	.069	.056
Genderc	β 03	−.022	.050	−.016	.048	−.013	.051
Educationd	β 04	−.072	.054	−.077	.049	−.066	.051
BMIe	β 05	.026	.052	.028	.050	.026	.052
TICSf	β 06	−.001	.058	−.006	.055	.0004	.057
Sleep (BP)	β 07	−.042	.085	−.278	.106*	.079	.082
Sleep (WP)	β 10	−.009	.010	−.016	.019	.045	.013**
Random Effects
Intercept	roi	.151	.008***	.136	.025***	.150	.027***
Residual	eit	.403	.008***	.399	.008***	.400	.008***
Sleep (WP)	r1i	.27E-5	.0004	.011	.005*	.003	.002
Model Fit
Deviance (df)		6161.053(9)***		6226.064(9)***		6186.651(9)***

Note: Original model parameterization included linear, quadratic, and cubic time effects. However, as these terms were not significant predictors and their removal did not substantively change parameter estimates, they were subsequently removed from models to facilitate interpretation. All variables were transformed into a Z-score metric prior to model parameterization.

^a0=Health Education, 1=Active Lifestyle.

^bMeasured in years since birth.

^c0=female, 1=male.

^dMeasured in years of schooling.

^eBMI=body mass index.

^fTICS=telephone interview of cognitive status (higher scores are indicative of better overall cognitive functioning).

^gPhysical Activity=minutes of moderate to vigorous physical activity.

BP=between-persons; WP=within-persons.

^*p<.05,

^**p<.01,

^***p<.001.