Table 5.

Correlations between perceived risk and injunctive norms (parents and friends) with tobacco and marijuana use.

	Tobacco					Marijuana
	PRT	IN P	IN F	FT	QC		PRM	IN P	IN F	FM
PRT		-0.13∗⁞	-0.22∗⁞	-0.19∗⁞	-0.16∗⁞	PRM		-0.27∗⁞	-0.51∗†	-0.42∗‡
IN P	-0.17∗⁞		0.38∗‡	0.25∗⁞	0.21∗⁞	IN P	-0.25∗⁞		0.36∗‡	0.35∗‡
IN F	-0.25∗⁞	0.33∗‡		0.29∗⁞	0.29∗⁞	IN F	-0.55∗†	0.29∗⁞		0.49∗‡
FT	-0.22∗⁞	0.30∗‡	0.37∗‡		0.75∗†	FM	-0.35∗‡	0.25∗⁞	0.43∗‡
QC	-0.19∗⁞	0.29∗⁞	0.32∗‡	0.74∗†

PRT, perceived risk for tobacco use; IN P, perceived parents′ norms for tobacco use; IN F, perceived peers′ norms for tobacco use; FT, frequency of tobacco use; QC, quantity of cigarettes consumed per smoking day; PRM, perceived risk for marijuana use; IN P, perceived parents′ norms for marijuana use; IN F, perceived peers′ norms for marijuana use; FM, frequency of marijuana use. The upper triangle presents results among men. The lower triangle presents results among women. ^∗p ≤ 0.001; The ^⁞,‡,† signs indicate low, medium and large effect sizes.