Table 2.

Drinking quantity predicting change in self-reported sleep parameters that evening (N=56).

	Outcome: Sleep Quality (self-report)			Outcome: Sleep Efficiency (self-report)			Outcome: Sleep Efficiency (actigraphy)
Parameter	Estimate	p	95% CI	Estimate	p	95% CI	Estimate	p	95% CI
Intercept	1.67	<.001	1.28, 2.07	69.39	<.001	63.85, 74.94	78.91	<.001	73.69, 84.12
Time	0.05	.03	0.01, 0.10	1.04	.002	0.39, 1.69	0.12	.75	−0.61, 0.85
L2 male (Y/N)	−0.35	.07	−0.73, 0.03	0.47	.86	−4.78, 5.73	−0.54	.83	−5.68, 4.60
L2 college student (Y/N)	0.05	.77	−0.31, 0.42	3.51	.17	−1.49, 8.51	−5.32	.03	−9.99, −0.65
L2 BMI (gmc)	−0.02	.16	−0.04, 0.01	−0.31	.08	−0.66, 0.03	−0.13	.43	−0.47, 0.20
L2 insomnia severity (gmc)	−0.06	.02	−0.10, −0.01	−0.58	.07	−1.22, 0.05	−0.64	.06	−1.30, 0.02
L2 days of cannabis use (gmc)	0.10	.06	−0.002, 0.21	1.23	.10	−0.23, 2.70	−1.55	.03	−2.93, −0.18
L2 drink-to-bed timing (gmc)	0.11	.08	−0.01, 0.24	0.48	.58	−1.26, 2.23	−0.86	.32	−2.58, 0.85
L2 drinking quantity (gmc)	−0.07	.41	−0.21, 0.09	0.60	.56	−1.46, 2.66	0.57	.59	−1.54, 2.68
L1 weekend (Y/N)	0.25	.02	0.05, 0.45	2.64	.06	−0.15, 5.43	1.51	.36	−1.76, 4.79
L1 prior day outcome (pmc)	−0.34	<.001	−0.44, −0.24	−0.40	<.001	−0.50, −0.30	−0.34	<.001	−0.49, −0.19
L1 cannabis use (Y/N)	0.12	.50	−0.22, 0.46	−4.13	.08	−8.81, 0.56	4.15	.08	−0.46, 8.77
L1 drink-to-bed timing (pmc)	−0.02	.56	−0.07, 0.04	1.07	.004	0.35, 1.78	−0.89	.12	−2.01, 0.23
L1 drinking quantity (pmc)	−0.004	.80	−0.03, 0.03	0.80	<.001	0.37, 1.23	−0.13	.63	−0.68, 0.41

Note. Shading indicates significant values. BMI=body mass index. CI=95% confidence interval. Drink-to-bed timing=time between drinking cessation and bedtime (positive values indicate drinking closer to bedtime). GMC=grand-mean centered. L1=level 1 (day-level or within-person) effects. L2=level 2 (between-person) effects. PMC=person-mean centered. Y/N=coded yes (1) or no (0).