Table 1.

Characteristics of REAL Group participants and non-participants before and after matching on propensity score

	Scale or range	Non-matched sample			Matched sample
		(n=361)			(n=204)
		REAL Group participants	Non-Participants	t-testa	REAL Group participants	Non-participants	t-testa
		% or mean	% or mean		% or mean	% or mean
Demographics
Age	11–14	12.34	12.22	2.10*	12.33	12.36	−0.37
Female gender	y/n	52.29%	56.75%	−0.78	53.92%	51.96%	0.28
Usual grades in school	1–9	6.56	6.4	0.88	6.64	6.72	−0.43
Mexican heritage	y/n	74.31%	64.29%	1.86+	72.55%	74.51%	−0.32
Two-parent household	y/n	71.56%	58.33%	2.37*	72.55%	80.39%	−1.32
Substance use exposures
Friends, use of substances	1–4	1.96	1.74	1.72+	1.93	1.97	−0.24
Parent talks about alcohol use	1–5	3.12	3.39	−1.79+	3.12	2.96	−0.79
How easy to get substances	1–4	2.05	2.14	−0.65	2.02	1.89	0.78
Behavioral risks
Use of alcohol	y/n	30.19%	26.94%	0.64	29.41%	29.41%	0.00
Use of cigarettes	y/n	9.17%	5.91%	1.10	7.84%	8.82%	0.25
Use of marijuana	y/n	9.17%	7.11%	0.66	6.86%	8.82%	0.52
Negative decision making	1–5	1.89	2.02	−1.38	1.86	1.81	0.47
Closeness to parent
Parental closeness	1–4	3.34	3.26	0.64	3.34	3.34	0.06

^at-tests were calcuated in Stata using the mim: regress or the mim: logistic command

^*p< .05,

⁺p< .10