Table 3.

Results of GEE models for each of the drinking outcome variables

	B	SE	IRR	95% CI	P value
Sum of Standard Drinks (SSD)
MODEL 1
STEP 1
Baseline SSD	.012	.00	1.01	1.01–1.02	< .0001
High v Low	−.323	.07	.72	.64–.82	< .0001
Moderate v Other 2 groups	.040	.03	1.04	.99–1.10	.14
Time	−.031	.01	.97	.95–.99	< .001
STEP 2
High v Low*Time	.004	.02	1.00	.97–1.04	.80
Moderate v Others*Time	.003	.01	1.00	.99–1.02	.66
MODEL 2
STEP 1
Baseline SSD	.012	.00	1.01	1.01–1.02	< .0001
High v Moderate	−.222	.06	.80	.71–.90	< .001
Low v Other 2 groups	.141	.03	1.15	1.08–1.22	< .0001
Time	−.031	.01	.97	.95–.99	< .001
STEP 2
High v Moderate*Time	−.002	.02	1.00	.97–1.03	.89
Low v Others*Time	−.004	.01	1.00	.98–1.01	.61
MODEL 3
STEP 1
Baseline SSD	.012	.00	1.01	1.01–1.02	< .0001
Low v Moderate	.101	.04	1.10	1.02–1.20	< .02
High v Other 2 groups	−.181	.04	.83	.77–.90	< .0001
Time	−.031	.01	.97	.95–.99	< .001
STEP 2
Low v Moderate*Time	−.006	.01	.99	.98–1.01	.44
High v Others*Time	.001	.01	1.00	.98–1.02	.95
Number of Drinking Days (NDD)
MODEL 4
STEP 1
Baseline NDD	.116	.02	1.12	1.07–1.17	< .0001
High v Low	−.219	.06	.80	.71–.91	< .001
Moderate v Other 2 groups	.064	.02	1.06	1.01–1.15	< .01
Time	−.013	.01	.99	.98–1.00	< .05
STEP 2
High v Low*Time	−.005	.01	1.00	.97–1.02	.74
Moderate v Others*Time	.004	.01	1.00	.99–1.01	.49
MODEL 5
STEP 1
Baseline NDD	.116	.02	1.12	1.07–1.17	< .0001
High v Moderate	−.206	.06	.81	.72–.92	< .001
Low v Other 2 groups	.077	.02	1.08	1.03–1.13	.001
Time	−.013	.01	.99	.98–1.00	< .05
STEP 2
High v Moderate*Time	−.008	.01	.99	.97–1.02	.56
Low v Others*Time	.000	.01	1.00	.99–1.01	.94
MODEL 6
STEP 1
Baseline NDD	.116	.02	1.12	1.07–1.17	< .0001
Low v Moderate	.013	.02	1.01	.96–1.06	.60
High v Other 2 Groups	−.142	.04	.87	.80–.94	< .001
Time	−.013	.01	.99	.98–1.00	< .05
STEP 2
Low v Moderate*Time	−.003	.01	1.00	.98–1.01	.60
High v Others*Time	−.004	.01	1.00	.98–1.01	.64
Drinks per Drinking Day (DDD)
MODEL 7
STEP 1
Baseline DDD	.063	.02	1.06	1.03–1.10	< .001
High v Low	−.350	.07	.70	.61–.81	< .0001
Moderate v Other 2 groups	.025	.03	1.02	.97–1.08	.38
Time	−.072	.01	.93	.91–.95	< .0001
STEP 2
High v Low*Time	−.045	.02	.96	.92–.99	.02
Moderate v Others*Time	.014	.01	1.01	1.00–1.02	.10
MODEL 8
STEP 1
Baseline DDD	.063	.02	1.06	1.03–1.10	< .001
High v Moderate	−.213	.07	.81	.71–.92	< .01
Low v Other 2 groups	.163	.03	1.18	1.11–1.25	< .0001
Time	−.072	.01	.93	.91–.95	< .0001
STEP 2
High v Med*Time	−.043	.020	.96	.92–.996	.03
Low v Others*Time	.016	.008	1.01	.998–1.03	.05
MODEL 9
STEP 1
Baseline DDD	.063	.02	1.06	1.03–1.10	< .001
Low v Moderate	.138	.04	1.15	1.06–1.24	< .001
High v Other 2 groups	−.188	.04	.83	.76–.90	< .0001
Time	−.072	.01	.93	.91–.95	< .0001
STEP 2
Low v Moderate*Time	.002	.010	1.00	.98–1.02	.85
High v Others*Time	−.029	.013	.97	.95–.995	.02

IRR = Incidence Rate Ratio