Tables 3.1. and 3.2.

Predicting within^a and between^b group effects on outcome measures using generalized estimating equation (GEE) models^{^}. PP sample.

Table 3.1		PP Sample (N=193)
		2-month	6-month	Condition x 2-month	Condition x 6-month
Outcome	GEE Model	Coef [95% CI]	Coef [95% CI]	Coef [95% CI]	Coef [95% CI]
TLFB PDD
	aTime (baseline= referent)	−0.266 [−0.32, −0.21]***	−0.236 [−0.28, −0.19]***
	bCondition x Time	−0.215 [−0.28, −0.15]***	−0.220 [−0.28, −0.16]***	−0.106 [−0.21, −0.004]*	−0.036 [−0.14, 0.06]
	cSMI Condition	−0.215 [−0.28, −0.15]***	−0.219 [−0.28, −0.16]***
	cIMI Condition	−0.321 [−0.40, −0.24]***	−0.256 [−0.33, −0.18]***
TLFB PHDD
	aTime (baseline= referent)	−0.280 [−0.33, −0.23]***	−0.245 [−0.29, −0.20]***
	bCondition x Time	−0.238 [−0.30, −0.17]***	−0.212 [−0.28, −0.15]***	−0.091 [−0.18, 0.003]^	−0.069 [−0.16, 0.03]
	cSMI Condition	−0.236 [−0.30, −0.17]***	−0.211 [−0.28, −0.15]***
	cIMI Condition	−0.328 [−0.40, −0.26]***	−0.281 [−0.35, −0.21]***
ASI Alcohol
	aTime (baseline= referent)	−0.298 [−0.33, −0.26]***	−0.290 [−0.33, −0.25]***
	bCondition x Time	−0.280 [−0.33, −0.23]***	−0.296 [−0.34, −0.25]***	−0.035 [−0.11, 0.04]	0.012 [−0.06, 0.08]
	cSMI Condition	−0.280 [−0.33, −0.23]***	−0.295 [−0.34, −0.25]***
	cIMI Condition	−0.316 [−0.37, −0.26]***	−0.284 [−0.34, −0.23]***
Table 3.2		Heavy Drinkers (N=141)
		2-month	6-month	Condition x 2-month	Condition x 6-month
Outcomes	GEE Models	Coef [95% CI]	Coef [95% CI]	Coef [95% CI]	Coef [95% CI]
TLFB PDD
	aTime (baseline= referent)	−0.309 [−0.37, −0.25]***	−0.271 [−0.33, −0.22]***
	bCondition x Time	−0.240 [−0.31, −0.17]***	−0.227 [−0.29, −0.16]***	−0.165 [−0.29, −0.04]**	−0.110 [−0.23, 0.01]^
	cSMI Condition	−0.242 [−0.31, −0.17]***	−0.228 [−0.30, −0.16]***
	cIMI Condition	−0.405 [−0.51, −0.30]***	−0.336 [−0.43, −0.24]***
TLFB PHDD
	aTime (baseline= referent)	−0.328 [−0.39, −0.27]***	−0.277 [−0.34, −0.22]***
	bCondition x Time	−0.264 [−0.34, −0.19]***	−0.216 [−0.29, −0.14]***	−0.153 [−0.27, −0.04]**	−0.146 [−0.26, −0.03]*
	cCondition	−0.263 [−0.34, −0.19]***	−0.216 [−0.29, −0.14]***
	cIMI Condition	−0.417 [−0.51, −0.33]***	−0.362 [−0.45, −0.27]***
ASI Alcohol
	aTime (baseline=referent)	−0.332 [−0.37, −0.29]***	−0.315 [−0.36, −0.27]***
	bCondition x Time	−0.299 [−0.35, −0.25]***	−0.299 [−0.35, −0.24]***	−0.077 [−0.16, 0.01]^	−0.040 [−0.13, 0.05]
	cSMI Condition	−0.299 [−0.35, −0.25]***	−0.299 [−0.35, −0.25]***
	cIMI Condition	−0.376 [−0.45, −0.31]***	−0.338 [−0.41, −0.27]***

Note: Note:

^aWithin group models include terms for condition and time.

^bBetween group models include terms for condition, time, and condition*time interaction.

^cModels are disaggregated on condition and includes a term for time (added here to aid interpretation of interaction models).

Models adjusted for age, ethnicity, education, marital status, and exposure (2+ MI9 sessions). Per-Protocol: The SMI Condition includes all participants assigned to the single session of MI; The IMI Condition includes all participants assigned to intensive MI who completed 7–9 session of the intervention. IMI participants who attended less than 7 sessions were dropped from the analyses (n=22). Heavy drinking = 14+ Days of Heavy Drinking at Baseline. ^ ASI Alcohol scale scores are logged.

^*p<.05

^**p<.01

^***p<.001

^{^}p<.10.