Table 2. Drinking with other friends/acquaintances as a moderator of weekday PTSD severity and weekend alcohol behavior.

Variables	Weekend Alcohol Quantity		Weekend Alcohol Con sequences
	β	RR [95% CI]	β	RR [95% CI]
Avg Weekday PTSD – Level 2	−.011	0.99 [0.96, 1.02]	.004	1.00 [0.96, 1.05]
Time	−.069	1.07 [0.94, 1.23]	.054	1.06 [0.81, 1.37]
Lagged Alcohol Behavior	−.090**	0.91 [0.88, 0.95]	−.379**	0.68 [0.63, 0.74]
Weekday PTSD Severity	−.009	0.99 [0.96, 1.02]	−.031	0.97 [0.89, 1.06]
Weekend Friend Alc Use	1.20**	3.31 [2.22, 4.93]	1.02**	2.79 [1.33, 5.85]
Weekday PTSD X Weekend Friend Alc Use	−.322**	0.72 [0.61, 0.86]	−.628**	0.53 [0.34, 0.84]

Note. β = Log-transformed coefficient; RR = Rate Ratio; C.I. = Confidence Interval; Avg = Average; PTSD = Posttraumatic Stress Disorder; Alc Use = Used alcohol that weekend (yes/no).

All variables were centered prior to interactions being calculated.

^*p < .05;

^**p < .01