Table 4.

Fixed Effects of Generalized Linear Mixed Models Predicting Drinking Behavior by Time, Perceived Parental Permissibility of Alcohol Use, and Gender: Aggregate Models

	Binge drinking Incidence rate ratio [CI]	Peak drinking Incidence rate ratio [CI]
Average drinking, π0
Intercept, γ00	1.07 [.94, 1.22]	4.28 [3.86, 4.76]***
Male gender, γ01	1.12 [.93, 1.35]	1.28 [1.10, 1.48]**
Mean permissibility, γ02	1.29 [1.23, 1.34]***	1.24 [1.20, 1.28]***
Average change over time, π1
Intercept, γ10	1.08 [1.05, 1.12]***	1.12 [1.08, 1.15]***
Male gender, γ11	.98 [.93, 1.03]	.96 [.92, 1.00]

Note. N = 679, CI = 95% confidence interval.

^*p < 0.05,

^**p < 0.01,

^***p < 0.001.

log(Outcome_ij) = γ₀₀ + γ₀₁Male Gender_i + γ₀₂Mean Permissibility_i + γ₁₀Time_ij + γ₁₁Male Gender_i × Time_ij + u_0i +ε_ij