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. Author manuscript; available in PMC: 2022 Aug 1.
Published in final edited form as: Addict Behav. 2021 Mar 26;119:106922. doi: 10.1016/j.addbeh.2021.106922

Table 3.

Negative Binomial Regression Results For Longitudinal Models

Outcome Predictor b SE b Z P eB eB 95% CI
T2 Drinks per week Intercept 1.639 .088 18.58 .000 5.150 4.333–6.122
Gender −.060 .169 −.35 .723 .942 .676–1.312
T1 Drinks per week .063 .012 5.02 .000 1.065 1.039–1.091
Shyness −.060 .099 −.61 .544 .942 .775–1.143
Drinking Norms .009 .012 .73 .463 1.009 .985–1.033
Shyness X Norms .035 .014 2.61 .009 1.036 1.008–1.064
T2 Alcohol-related problems Intercept 1.269 .144 8.79 .000 3.556 2.679 – 4.718
T1 Problems .058 .017 3.31 .001 1.059 1.024 –1.096
T1 Drinks per week .025 .022 1.11 .268 1.025 .981 – 1.071
Gender −.056 .291 −.19 .848 .946 .535 – 1.672
Shyness .140 .194 .72 .472 1.150 .786 – 1.683
Drinking Norms .017 .018 .97 .333 1.017 .983 – 1.053
Shyness X Norms .007 .025 .29 .772 1.007 .959– 1.057

Note. eB are exponentiated coefficients, which are interpretable as rate ratios; Male = 1; Female = 0; T1 = baseline; T2 = 1-month follow-up.