Table 2.

One-sided Binomial Probability Tests evaluating whether Proportion ≥ 0.001.

	N	Proportion	z-statistic	p-value
STUDY 1
Increased Alcohol Use
Adults without Children	202	0.208	7.25	<0.0001
Parents	644	0.186	12.08	<0.0001
Adolescents	75	0.253	5.02	<0.0001
Increased Drug Use
Adults without Children	202	0.040	2.813	0.003
Parents	645	0.012	2.617	0.004
Adolescents	75	0.093	2.749	0.003
STUDY 2
Increased Alcohol Use
Adults without Children	59	0.220	4.065	<0.0001
Parents	168	0.125	4.860	<0.0001
Adolescents	47	0.362	5.147	<0.0001
Increased Drug Use
Adults without Children	59	0.153	3.238	0.001
Parents	164	0.077	3.705	0.0001
Adolescents	47	0.128	2.602	0.005