Table 3.

HLM analyses demonstrating relations between previous night nocturnal sleep variables and next day nap variables

	Nap start time			Nap duration			Nap occurrence
Predictor	b	SEa	t	b	SEa	t	OR	95% CI	B
Bedtime	0.19	0.07	2.54*	2.36	0.57	4.16***	1.13	1.07-1.20	0.13***
“Other” living situationb	0.46	1.09	0.42	6.57	11.09	0.59	1.69	0.61-4.69	0.53
Living with parentsb	0.81	0.35	2.30*	−0.59	2.73	−0.22	0.88	0.64-1.20	−0.13
Living in off-campus apartmentb	0.10	0.42	0.23	−0.32	3.22	−0.10	0.95	0.65-1.37	−0.06
Racec	−0.03	0.26	−0.13	0.20	2.09	0.10	0.92	0.74-1.16	−0.08
Ethnicityd	0.18	0.33	0.53	2.63	2.81	0.94	1.43	1.06-1.94	0.36*
Income	0.02	0.09	0.20	−1.36	0.74	−1.83	0.95	0.88-1.03	−0.05
Wake time†	0.42	0.07	5.62***	−3.44	0.55	−6.30***	0.82	0.77-0.88	−0.20***
“Other” living situationb	0.56	1.08	0.52	6.74	11.52	0.59	1.64	0.49-5.44	0.49
Living with parentsb	1.05	0.35	2.97**	−4.60	2.85	−1.61	0.69	0.49-0.97	−0.37*
Living in off-campus apartmentb	0.11	0.42	0.27	−2.59	3.35	−0.77	0.84	0.57-1.24	−0.17
Racec	0.06	0.26	0.25	1.31	2.17	0.61	0.97	0.77-1.23	−0.03
Ethnicityd	0.19	0.33	0.58	1.60	2.92	0.55	1.36	0.99-1.86	0.31
Income	−0.01	0.09	−0.11	−1.10	0.77	−1.41	0.97	0.89-1.05	−0.03
Sleep duration	0.00	0.00	2.13*	−0.08	0.01	−10.36***	0.99	0.99-0.99	−0.00***
“Other” living situationb	0.51	1.10	0.46	5.67	11.59	0.49	1.69	0.58-4.87	0.52
Living with parentsb	0.74	0.35	2.12*	−2.22	2.83	−0.79	0.80	0.58-1.11	−0.22
Living in off-campus apartmentb	0.01	0.42	0.03	−2.87	3.35	−0.86	0.88	0.61-1.28	−0.13
Racec	0.11	0.23	0.44	0.91	2.17	0.42	0.94	0.75-1.17	−0.07
Ethnicityd	0.09	0.33	0.26	2.02	2.93	0.69	1.39	1.02-1.89	0.33*
Income	0.05	0.09	0.58	−0.75	0.77	−0.97	0.97	0.90-1.05	−0.03

^*p<.05

^**p<.01

^***p<.001

^aStandard error

^bReference group=Living in a residential hall

^cReference group=White students

^dReference group=Non-Hispanic students

^†This reflects the wake time that occurred that morning prior to the nap occurring