Table 4.

Logistic Multilevel Models Testing Whether Students Were More Likely to Engage in Risky Substance Use Behaviors on Days Drinking Began During the Day Versus in the Evening or at Night

	Played Drinking Games	Mixed Alcohol with Energy Drinks	Used Marijuana
	N = 7,528 days	N = 4,638 days	N = 7,543 days
Fixed Effects	OR [95% CI]	OR [95% CI]	OR [95% CI]
Level 1: Daily Level
Intercept	.38 [.34, .42]***	.04 [.03, .05]***	<.01 [<.01, <.01]***
Day Drinking Day	1.40 [1.12, 1.74]**	1.12 [.75, 1.70]	1.56 [1.01, 2.41]*
Social Weekend Daya	2.42 [2.03, 2.89]***	1.18 [.86, 1.63]	1.33 [.96, 1.84]
Level 2: Semester Level
Semester-Mean Day Drinking	1.62 [1.04, 2.51]*	1.11 [.43, 2.86]	.88 [.23, 3.39]
Semester Number	.90 [.87, .93]***	1.04 [.91, 1.18]	1.08 [.97, 1.20]
Level 3: Person Level
Person-Mean Day Drinking	3.72 [1.40, 9.91]**	6.90 [1.37, 34.80]*	6.52 [.43, 98.70]
Male	1.27 [1.03, 1.57]*	1.41 [.97, 2.07]	3.14 [1.56, 6.33]**
Greek Participant	1.26 [1.01, 1.57]*	1.33 [.90, 1.97]	1.89 [.93, 3.86]
Student Athlete	1.49 [1.20, 1.85]***	.79 [.54, 1.15]	.41 [.20, .82]*
Honors Student	.71 [.49, 1.02]	.59 [.30, 1.15]	.76 [.23, 2.59]

Note. N = 618 students. OR = Odds ratio, CI = Confidence interval. Daily-level variables were semester-mean-centered, semester-level variables were person-mean-centered, and person-level variables were grand-mean-centered. Semester number was centered at its midpoint (i.e., Semester 4).

^aSocial Weekend Day = Thursday-Saturday (versus Sunday-Wednesday).

^*p < .05

^**p < .01

^***p < .001.