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To compare post‐treatment alcohol use between those who use cannabis and those who abstain during treatment for alcohol use disorders (AUD); and to examine potential cannabis use thresholds by comparing post‐treatment alcohol use between four frequency groups of cannabis users relative to abstainers.

Secondary analyses of the Combined Pharmacotherapies and Behavioral Interventions (COMBINE) Study, a randomized control trial of AUD treatments. The current study compares longitudinal drinking data between those who used cannabis versus those who abstained during COMBINE treatment.

The COMBINE Study treatments were delivered on an out‐patient basis for 16 weeks. The current analyses include 206 cannabis users and 999 cannabis abstainers.

All participants met diagnosis of primary alcohol dependence (n = 1383).

Primary …