Table 2.

Prevalence and means of key study variables.

Variable	Cumulative %	Range across waves 1–7
Child past year substance use
Alcohol	26%	0% – 14%
Cigarettes	16%	0% – 9%
Marijuana	24%	0% – 14%
Substance-specific parenting practices
Family rules about alcohol	--	M = 3.5 – 3.7
Family rules about cigarettes	--	M = 3.5 – 3.8
Family rules about drugs	--	M = 3.6 – 3.9
Child alcohol use with permission	12%	3% – 9%
Child cigarette use with permission	2%	0.4% – 1.4%
Child involvement in family alcohol use	34%	10% – 25%
Child involvement in family cigarette use	21%	5% – 17%
Family management	--	M = 3.4 – 3.8
Parent substance use (past month)
Binge drinking	36%	13% – 19%
Cigarette use	48%	29% – 46%
Marijuana use	29%	14% – 21%
Parent substance use norms
Pro alcohol norms	--	M = 2.0 – 2.9
Pro cigarette norms	--	M = 1.9 – 2.8
Pro marijuana norms	--	M = 1.8 – 3.1