Table 3.

SJL and Metabolic Risk Factors, Adjusted for Demographic and Behavioral Covariates

Predictor	Dependent Variables β
	Triglycerides	HDL Cholesterol	Fasting Insulin	HOMA-IR	Waist	BMI
Step 1
Age	0.16**	0.03	−0.04	0.01	0.17**	0.11*
Sex	−0.26**	0.51**	−0.09	−0.12*	−0.40**	−0.12*
Race	−0.16**	0.01	0.09	0.07	0.06	.11*
Education	0.01	−0.00	−0.14**	−0.14**	−0.13**	−0.12*
Income	−0.16	0.00	−0.01	−0.02	−0.00	−0.04
Work status	0.07	0.01	−0.03	−0.03	−0.01	−0.01
Sleep duration	0.05	−0.01	0.09	0.08	0.07	0.06
Sleep debt	−0.05	0.03	−.13*	−.10*	−.11*	−.12*
Sleep efficiency	−0.03	.10*	−0.07	−0.09	−0.08	−0.09
Sleep quality	0.03	0.06	.13*	.13*	.10*	0.09
Step 2
Depression	0.01	−0.06	0.01	0.01	−0.03	−0.02
Alcohol	−0.03	.24**	−0.03	−0.01	−0.02	−0.02
Physical activity	−.26**	−.13**	−.14**	−.15**	−.18**	−.15**
Calories consumed	0.06	0.08	0.05	0.04	0.08	0.06
Smoking status	0.01	0.02	−0.07	−0.06	0.01	−0.02
Step 3
SJL	.11*	−0.09*	.11*	.11*	.15**	.17**

Values represent independent hierarchical linear regression analysis. Sleep duration (hours), sleep debt (minutes), and sleep efficiency (%) are based on sleep actigraphy. Sleep quality is indexed as total PSQI score. Depression denotes total CES-D score minus sleep questions; alcohol, average number of drinks/month; physical activity, total kilocalories/day; calories consumed, total calories/day; and smoking status, current smoker vs ex/never smoker.

^*P < .05.

^**P < .01.