. Author manuscript; available in PMC: 2015 Feb 1.

Published in final edited form as: Health Psychol. 2013 Feb 4;33(2):182–191. doi: 10.1037/a0031253

Table 1.

Negative Binomial Models for Intervention × DRD4 × Target Sex Effects on Increases in Youth Substance Use

	Model 1		Model 2
	Estimate	SE	Estimate	SE
Constant	−1.038^***	.287	−1.124^***	.310
Substance use, pretest	1.268^***	.155	1.367^***	.149
DRD4 status	0.425^**	.160	−0.042	.266
Intervention status			−0.105	.260
Youth gender			0.006	.348
Intervention status × DRD4 status			0.089	.407
Youth gender × DRD4 status			1.288^**	.458
Intervention status × youth gender			0.608	.444
Intervention status × DRD4 status × youth gender			−1.398^*	.613
Socioeconomic risk	−0.014	.028	−0.022	.028
Community risk	0.016^*	.008	0.019^**	.007

Note: The estimates presented in the table are in log(μ) metric. The standard errors (SE) presented in the table are the robust standard errors.

p < .05.

^**

p < .01.

^***

p < .001.