Table 4.

Repeated-measures mixed-effects models with perceived interactivity and perceived entertainment predicting intention to smoke.

Variables	Intention to smokea
	Model 1		Model 2		Model 3
	beta (SE)b	P value	beta (SE)	P value	beta (SE)	P value
Perceived interactivityc	−0.27 (0.01)	.004	-	.039	-0.23 (0.01)
Perceived entertainmentc	-		−0.20 (0.01)	.038	−0.06 (0.01)	.60
Condition	0.11 (0.17)	.355	0.10 (0.18)	.462	0.16 (0.18)	.37
Time	0.01 (0.06)	.797	0.01 (0.06)	.856	0.01 (0.06)	.85
Condition × timec	−0.22 (0.11)	.007	−0.19 (0.11)	.007	−0.19 (0.11)	.007
Intercept	3.05 (0.81)	<.001	2.92 (0.83)	<.001	3.16 (0.89)	<.001
Wald chi-square	34.32	<.001	35.04	<.001	36.68	<.001

^aIndicates dependent outcome variable.

^bIndicates standardized values followed by standard error.

^cIndicates variables of interest. The models control for covariates (age, gender, prior knowledge, school grades, school detentions, and number of friends who smoke), with no significant relationship between such covariates and intention to smoke.