Table 7. Summary of GEE Models Predicting Momentary Subjective Responses Fitting Between- and Within-Individual Effects for eBAC as a Function of Age Group.

			95% CI
Model and predictor variables	β	SE	LL	UL	p
Stimulation
Sex (female)	0.08	0.15	− 0.21	0.36	.604
Alcohol dependence	− 0.21	0.17	− 0.55	0.12	.214
Drinking daysa	0.04	0.15	− 0.25	0.33	.777
Heavy drinking daysa	0.00	0.14	− 0.27	0.27	.990
Begin-drink stimulation	0.45	0.07	0.32	0.58	<.001
Average eBAC	− 0.11	0.07	− 0.25	0.03	.116
Momentary eBAC	0.00	0.04	− 0.08	0.09	.923
Age Group	0.53	0.29	− 0.03	1.09	.063
Age Group × Average eBAC	0.11	0.13	− 0.15	0.36	.413
Age Group × Momentary eBAC	− 0.27	0.09	− 0.44	− 0.09	.003
Alcohol Craving
Sex (female)	0.29	0.11	0.07	0.51	.010
Alcohol dependence	− 0.06	0.14	− 0.33	0.22	.679
Drinking daysa	− 0.10	0.17	− 0.43	0.24	.577
Heavy drinking daysa	0.11	0.09	− 0.08	0.29	.262
Begin-drink craving	0.61	0.07	0.48	0.73	<.001
Average eBAC	− 0.01	0.09	− 0.18	0.16	.923
Momentary eBAC	0.03	0.07	− 0.10	0.16	.610
Age Group	0.23	0.25	− 0.26	0.73	.359
Age Group × Average eBAC	0.04	0.18	− 0.31	0.40	.806
Age Group × Momentary eBAC	− 0.11	0.13	− 0.37	0.15	.406

Note: Subjective responses are continuous and standardized. In both models, age group was coded with an orthogonal contrast (− 0.5 for adults versus 0.5 for adolescents). The reported coefficients represent standardized effects (effect size d). GEE = generalized estimating equation; eBAC = estimated blood alcohol concentration; SE = standard error; CI = confidence interval; LL = lower limit; UL = upper limit; Average eBAC = average eBAC across all momentary drink reports during the monitoring period and reflects the between-person effect; Momentary eBAC = person-centered estimated eBAC and reflects the within-person effect;

^aderived from the 90-day Timeline Follow-Back interview conducted at baseline.