Table 6.

Individual and classroom level effects of impulsivity, peer susceptibility, alcohol popularity norms, and their interaction on adolescents’ smoking behavior at T3

	B	SE	95% CI	Deviance (AIC/BIC)
Random intercept				1746/1763
Variance smoking T3	3.76**	0.94	[2.13–5.39]
Model 1				9980/10063
Variance smoking T3	2.39**	0.51	[1.55–3.24]
Smoke T2	0.47**	0.16	[0.21–0.73]
Sex	0.94*	0.09	[0.28–1.60]
Within effect peer susceptibility	0.45	0.26	[0.02–0.88]
Within-effect impulsivity	0.63	0.46	[−0.13–1.39]
Education	−0.36**	0.02	[−0.55–−0.17]
Model 2				9978/10066
Variance smoking T3	2.39**	0.77	[1.14–3.65]
Smoke T2	0.44*	0.18	[0.14–0.75]
Sex	1.01*	0.40	[0.35–1.67]
Within effect peer susceptibility	0.42	0.26	[−0.04–0.84]
Within-effect impulsivity	0.63	0.46	[−0.13–1.39]
Education	−0.31*	0.14	[−0.54–−0.07]
Popularity norms smoke	1.96**	0.87	[0.29–3.17]

Model 1 = model with individual main effects and education; Model 2 = model with alcohol popularity norms added

*p < 0.05; **p < 0.01