Table 3.

Multiple regression analyses of BIS, BAS, and effortful control predicting alcohol and marijuana use

		Variables	Alcohol Use					Marijuana Use
			b [95%CI]	SE	b*	p	R2	b [95% CI]	SE	b*	p	R2
	Age		.21 [.159, .257]	.03	.18*	.000		.08 [.025, .127]	.03	.07*	.004
	Sex		−.03 [−.129, .079]	.05	−.01	.740		−.31 [−.421, −.206]	.06	−.14*	.000
	Race		.45 [.340, .551]	.05	.18*	.000		.18 [.072, .291]	.06	.07*	.001
	FES		.13 [.085, .172]	.02	.13*	.000	.08	.03 [−.013, .078]	.02	.03	.158	.03
	BIS		−.16 [−.257, −.054]	.05	−.08*	.000		−.07 [−.178, .032]	.05	−.04	.175
	BAS		.15 [.111, .189]	.02	.17*	.000		.12 [.077, .158]	.02	.14*	.000
	ATQ-IC		−.07 [−.131, −.009]	.03	−.06	.026		−.03 [−.091, .036]	.03	−.02	.397
	ATQ-AT		.00 [−.055, .054]	.03	.00	.995		.01 [−.042, .071]	.03	.02	.619
	ATQ-AC		−.13 [−.180, −.070]	.03	−.12*	.000	.14	−.18 [−.234, −.121]	.03	−.17*	.000	.07
	BIS X BAS		.04 [−.039, .123]	.04	.03	.308		.00 [−.085, .082]	.04	.00	.971
	BIS X ATQ-IC		.12 [.001, .247]	.06	.05	.048		.17 [.043, .298]	.07	.07*	.009
	BIS X ATQ-AT		−.06 [−.156, .047]	.05	−.03	.291		−.05 [−.155, .055]	.05	−.03	.350
	BIS X ATQ-AC		.03 [−.080, .135]	.06	.01	.617		.05 [−.063, .055]	.06	.02	.396
	BAS X ATQ-IC		.01 [−.041, .053]	.02	.01	.809		−.01 [−.063, .035]	.03	−.02	.568
	BAS X ATQ-AT		−.01 [−.055, .034]	.02	−.01	.640		−.03 [−.072, .020]	.02	−.03	.272
	BAS X ATQ-AC		.01 [−.036, .056]	.02	.01	.671	.15	.03 [−.014, .081]	.02	.04	.166	.08

Note. Coefficients in bold significant at p < .05; * p < .05 after controlling for false discovery rate; b* = standardized regression coefficient; b = unstandardized coefficient; CI = confidence interval; FES = family economic status; BIS = Behavioral inhibition scale; BAS = Behavioral activation scale; ATQ = adult temperament questionnaire; ATQ-IC = inhibitory control; ATQ-AT = attentional control; ATQ-AC = activation control. Sex is coded male = 0 and female = 1. Race is coded Caucasian = 1 and other = 0.