Table 3.

Final Regression Model Predicting Initiation from W1 to W2 as a Function of Risk and Protective Factors and their Interactions with Best Friends’ Smoking

	Initiation (N = 4,612)
Predictors	OR	95% CI	p =
Male	1.03	[0.84–1.25]	.803
White	1.21	[1.01–1.45]	.037
Grade	0.85	[0.80–0.90]	<.001
Parental education	1.05	[0.95–1.15]	.326
Daily smokers in school	2.07	[0.66–6.46]	.212
Smoking friend at W2	4.49	[3.59–5.61]	<.001
Trouble at school	1.18	[1.04–1.33]	.009
Access to cigarettes at home	1.49	[1.23–1.82]	<.001
Grade point average	0.80	[0.71–0.90]	<.001
Delinquent behavior	8.92	[4.34–18.3]	<.001
Delinquent behavior*Smoking friend at W2	0.13	[0.05–0.33]	<.001