Fecha de publicación: -- Fuente: PubMed "bee" Addict Behav. 2026 Nov 1;185:108893. doi: 10.1016/j.addbeh.2026.108893. Online ahead of print.ABSTRACTINTRODUCTION: Veterans experiencing homelessness with substance use disorders (SUD) represent a large and clinically complex population within the U.S. Department of Veterans Affairs. Group Motivational Interviewing (GMI) may offer a scalable approach to enhancing treatment attendance and examining substance use outcomes. This randomized controlled trial evaluated GMI compared to a Life Skills Education Group (LSEG) among homeless Veterans with SUD, most of whom had co-occurring psychiatric disorders.METHODS: A total of 185 dually diagnosed homeless Veterans were randomized to four sessions of GMI or LSEG and followed for 6 months. Treatment attendance and substance use were primary outcomes of interest. Outcomes were analyzed at each follow-up using regression models appropriate to distributional characteristics, including negative binomial, log-normal, and two-part models.RESULTS: At 6-month follow-up, GMI participants attended significantly more SUD treatment sessions (IRR = 1.84, p < 0.001), general mental health treatment sessions (IRR = 2.89, p < 0.001), and twelve-step meetings (IRR = 1.74, p = 0.001) compared to LSEG. No significant differences were observed between conditions on substance use outcomes, with the exception of higher peak drinking in GMI at 3 months (p = 0.04).CONCLUSION: GMI significantly enhanced treatment attendance but did not reduce substance use relative to an educational control. These findings suggest that brief GMI may improve treatment engagement, but additional intervention components or longer follow-up may be needed to produce measurable substance use reductions among homeless Veterans with SUD.TRIAL REGISTRATION: NCT02233738.PMID:42987742 | DOI:10.1016/j.addbeh.2026.108893