Table 4.

Association between Drinks, Marijuana Use and Subsequent Likelihood of Interpersonal Conflict 1 through 4 Hours Later

Variable	1 Hour Later		2 Hours Later		3 Hours Later		4 Hours Later
Within-level	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Alcohol use	1.045+	[0.992, 1.102]	1.069***	[1.026, 1.113]	1.074***	[1.037, 1.111]	1.082***	[1.048, 1.117]
Marijuana use	1.986+	[0.930, 4.244]	1.902*	[1.095, 3.304]	1.646*	[1.001, 2.705]	1.658*	[1.030, 2.667]
Alcohol × marijuana	0.000^	[0.000, 0.000]	0.963	[0.798, 1.162]	0.993	[0.897, 1.099]	0.985	[0.907, 1.071]
Weekend	1.450**	[1.109, 1.897]	1.414*	[1.088, 1.838]	1.386*	[1.065, 1.804]	1.354*	[1.048, 1.748]
Study day	0.974***	[0.966, 0.983]	0.974***	[0.966, 0.983]	0.974***	[0.966, 0.983]	0.974***	[0.966, 0.983]
Between-level	B (S.E.)	95% CI	B (S.E.)	95% CI	B (S.E.)	95% CI	B (S.E.)	95% CI
Delinquency	0.006 (0.015)	[−0.024, 0.036]	0.005 (0.015)	[−0.025, 0.035]	0.004 (0.015)	[−0.026, 0.034]	0.003 (0.015)	[−0.027, 0.033]
Alcohol days	0.069 (0.026)**	[0.018, 0.121]	0.068 (0.026)*	[0.016, 0.120]	0.066 (0.026)*	[0.015, 0.118]	0.064 (0.026)*	[0.013, 0.116]
Marijuana days	0.022 (0.016)	[−0.009, 0.053]	0.022 (0.016)	[−0.009, 0.052]	0.022 (0.016)	[−0.009, 0.053]	0.022 (0.016)	[−0.009, 0.053]
Alcohol + MJ days	−0.002 (0.038)	[−0.077, 0.074]	−0.003 (0.038)	[−0.079, 0.072]	−0.005 (0.038)	[−0.081, 0.070]	−0.007 (0.038)	[−0.083, 0.068]

Notes: OR = Odds Ratio; B = (un)standardized beta;

^***p < .001;

^**p < .01;

^*p < .05;

⁺p < .10;

^{^}parameter was fixed to avoid the singularity of the information matrix.