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. Author manuscript; available in PMC: 2019 Mar 6.
Published in final edited form as: J Adolesc Health. 2017 Mar 18;60(6):641–647. doi: 10.1016/j.jadohealth.2017.01.009

Table 3.

Probit Regression Analyses Predicting Adolescent Initiation of Drinking Behaviors

First Drink by T2 First Time Drunk by T2 First HED by T2
β (SE) OR β (SE) OR β (SE) OR
Control Variables
  Sex −0.12 (0.09) 0.67 −0.15 (0.08) 0.60 −0.17 (0.10) 0.50
  Race 0.22 (0.10)* 2.84 0.20 (0.09)* 2.63 0.17 (0.10) 2.36
  Age 0.10 (0.09) 1.19 −0.01 (0.09) 0.98 −0.14 (0.11) 0.78
  Daily Time on Facebook −0.03 (0.10) 0.98 −0.12 (0.09) 0.90 −0.09 (0.10) 0.92
Time 1 Predictors
  Exposure to Friends' SNS Alcohol Content 0.18 (0.07)* 2.36 0.08 (0.08) 1.41 0.16 (0.07)* 2.03
  Peer Injunctive Norms 0.24 (0.08)** 1.24 0.42 (0.09)*** 1.45 0.43 (0.10)*** 1.46
  Extreme Peer Orientation −0.02 (0.08) 0.97 −0.03 (0.09) 0.95 −0.03 (0.09) 1.01
  Parental Monitoring −0.16 (0.09) 0.74 −0.18 (0.08)* 0.71 −0.15 (0.09) 0.76

Note: OR = "Odds Ratio”; For Sex, female = 0 and male =1; for Race, non-white = 0 and white = 1. Odds ratios calculated by multiplying raw probit parameters by 1.7 (converting to logit parameters) and exponentiating the resulting coefficients.

*

p < .05;

**

p < .01;

***

p < .001;