Table 3.

Odds ratio estimates for Time 2 sleep insufficiency on Weekdays and Weekends.

	Weekday			Weekend
	OR	95% CI		OR	95% CI
Gender (ref = male)	0.87	0.53	1.44	0.72	0.33	1.58
Ethnicity Hispanic (ref = White)	1.74	1.06	2.87	1.32	0.66	2.62
Ethnicity African American (ref = White)	1.65	1.00	2.73	2.26	0.99	5.15
Ethnicity Other (ref = White)	2.09	0.80	5.42	0.40	0.07	2.17
Family Affluence Moderate (ref = Low)	1.14	0.74	1.76	1.19	0.43	3.30
Family Affluence High (ref = Low)	0.95	0.54	1.66	1.38	0.66	2.86
Parent Education Bachelor or Higher (ref = High School or less)	1.26	0.70	2.28	0.54	0.14	2.12
Parent Education Some College (ref = High School or less)	1.47	1.00	2.16	1.23	0.48	3.14
Time 1 Weekday Sleep Insufficiency	1.73	1.22	2.44	--	--	--
Time 1 Weekend Sleep Insufficiency	--	--	--	2.86	0.93	8.84
School Type Community (ref = University)	0.96	0.36	2.54	3.28	0.94	11.43
School Type No School (ref = University)	0.42	0.16	1.07	3.56	1.10	11.54
Work Hours (≤ 20 hours (ref = none)	1.24	0.76	2.02	0.96	0.20	4.65
Work Hours 21+ hours (ref = none)	1.32	0.65	2.70	2.42	0.58	10.07
School * Work Interaction Community/Tech*21+ Hours per week	1.13	0.36	3.60	0.57	0.11	2.91
School * Work Interaction Community /Tech*(≤ 20 Hours per week	0.56	0.17	1.83	1.18	0.17	8.21
School * Work Interaction No School*21+ Hours per week	1.56	0.37	6.53	0.54	0.07	4.07
School * Work Interaction No School*(≤ 20 Hours per week	2.21	0.19	26.04	0.74	0.07	8.13

Note. OR = Odds ratio, greater than 1 indicates more likely to experience insufficient sleep at Time 2. CI = confidence interval. Bold indicates significant odds ratios at p < .05.

Two analyses were conducted separately for weekday and weekend.