Table 2.

Results for the Mediated Moderation Model

	Model 1a			Model 2			Model 3
	DV: Wave 2 thirty-day smokingb			DV: Wave 2 perceived friend prevalencec			DV: Wave 2 thirty-day smoking
Independent variable	β	SE	p	β	SE	p	β	SE	p
Intercept	−2.91	0.40	<.0001	.001	0.26	.99	−3.08	0.42	<.0001
C: Wave 1 thirty-day smoking	1.68	0.21	<.0001				1.46	0.23	<.0001
C: Wave 1 perceived friend smoking				0.25	0.03	<.0001	0.08	0.05	.11
X: Program (Tx = 1 and control = 0)	1.63	0.75	.03	0.09	0.31	.77	1.98	0.79	.01
Z: Comorbidity (CoM)	0.96	0.53	.07	1.33	0.39	.0007	0.85	0.57	.14
XZ: Program × CoM	−1.39	0.66	.04	−1.20	0.49	.01	−1.29	0.70	.07
M: Wave 2 perceived friend smoking prevalence							0.29	0.04	<.0001
MZ: Wave 2 perceived friend smoking prevalence × CoM							−0.06	0.14	.64

Note. C = control variable; DV = dependent variable; M = mediator variable; X = independent variable; Z = moderator variable; MZ = interaction between mediator and moderator variable; XZ = interaction between independent and moderator variable.

^aAll models controlled for attrition propensity score and school.

^bThirty-day smoking represents the number of smokers who indicated they smoked in the past thirty days within the indicated wave (1 = yes and 0 = no).

^cPerceived friend prevalence represents the number of friends they believe smoked in the past thirty days (0 = none to 12 = 12 friends or more).