Peer selection and influence effects on adolescent alcohol use: a stochastic actor-based model

BMC Pediatrics

Table 4 Stochastic Actor-Based Model Results for Influence Effects on Alcohol Use Behavior

	β	SE(β)	p-value^a	Between school std. dev.	Fisher’s combination 1-side test
					Right-side(+)	Left-side(-)
Linear shape parameter	-0.60	0.09	<.001	0.34	1.000	<.001
Quadratic shape parameter	0.07	0.02	.003	0.08	<.001	.999
Average friend alcohol use effect	0.07	0.04	.139	0.18	.498	.780
Age effect	0.02	0.03	.456	0.13	.059	.733
Gender effect (male)	0.07	0.06	.252	0.24	.101	.667
Race effect (non-white)	0.04	0.05	.489	0.14	.330	.914
Parental drinking effect	0.03	0.03	.220	0.10	.103	.882
Family bonding effect	-0.06	0.02	.009	0.08	.999	.011

^aSnijders-Baerveldt two-sided test [39].
Parameter estimates β and standard error for stochastic actor-based model of change in alcohol use in the Add Health study. Alcohol use frequency measured on a 0 (never) to 4 (weekly or more often) scale. Coefficients correspond to the change in log-odds of increased drinking frequency given a one-unit increase in the independent variable. Characteristics are bolded when the Fisher’s combination test yields a p-value less than 0.025.

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