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. Author manuscript; available in PMC: 2021 Jan 30.
Published in final edited form as: Subst Use Misuse. 2020 Jan 30;55(6):973–982. doi: 10.1080/10826084.2020.1717535

Table 3.

Hurdle Models Predicting Likelihood and Quantity of Daily Alcohol Consumption

Interactions Logistic Portion of Model
 Count Portion of Model
b 95% CI p b 95% CI p
Greek x Positive 0.072 −0.07, 0.19 0.286 −0.024 −0.07, 0.03 0.322
Greek x Negative 0.048 −0.07, 0.18 0.504 −0.035 −0.07, 0.01 0.080
Sex x Positive 0.152 0.01, 0.28 0.030 0.020 −0.03, 0.06 0.384
Sex x Negative −0.050 −0.17, 0.09 0.442 −0.012 −0.05, 0.03 0.486
Baseline Drinks Per Week x Positivea 0.009 −0.06, 0.07 0.790 −0.027 −0.05, −0.01 0.020
Baseline Drinks Per Week x Negativea −0.018 −0.08, 0.04 0.568 −0.007 −0.02, 0.01 0.468
Baseline RAPI x Positive 0.003 −0.06, 0.08 0.920 0.006 −0.02, 0.03 0.638
Baseline RAPI x Negative 0.001 −0.07, 0.06 0.956 −0.011 −0.03, 0.01 0.220
Age x Positive −0.149 −0.35, 0.01 0.092 0.088 0.03, 0.15 0.002
Age x Negative 0.122 −0.28, 0.05 0.156 0.016 −0.03, 0.06 0.500
Weekend x Positive 0.009 −0.11, 0.12 0.872 −0.025 −0.07, 0.01 0.218
Weekend x Negative 0.083 −0.02, 0.20 0.146 −0.032 −0.06, 0.01 0.072
Positive Expectancies x Positiveb 0.007 −0.06, 0.08 0.850 0.024 0.01, 0.05 0.030
Positive Expectancies x Negativeb 0.125 0.06, 0.19 <0.001 −0.004 −0.03, 0.02 0.690
Negative Expectancies x Positivec −0.028 −0.09, 0.04 0.374 −0.018 −0.04, 0.01 0.132
Negative Expectancies x Negativec 0.011 −0.06, 0.08 0.726 −0.027 −0.05, −0.01 0.010

Note. CI = Credible Interval. Greek status was dummy-coded (0 = no Greek affiliation, 1 = fraternity or sorority affiliation). Sex was dummy-coded (0 = men, 1 = women).

a

Derived from the Daily Drinking Questionnaire conducted at baseline. RAPI = Rutgers Alcohol Problem Index. Study period was dummy-coded (0 for 1st quarter of daily reporting to 3 for 4th quarter of daily reporting). Weekend was dummy-coded (0 = Sunday to Wednesday, 1 = Thursday to Saturday).

b

Models reflect interactions between participant’s average positive expectancies across the study period and daily expectancies.

c

Models reflect interactions between participant’s average negative expectancies across the study period and daily expectancies.