Longitudinal Assessment of a Manualized Group Treatment Program for Gambling Disorder: The Ohio Problem Gambling Treatment Model for Adults with Co-Occurring Disorders.

Individuals with gambling disorder (GD) experience a host of negative psychosocial and physical health outcomes, yet few seek treatment. Of particular concern are individuals with co-occurring mental and behavioral health disorders, a group at higher risk for GD in the state of Ohio. To better serve this population, the Ohio Department of Mental Health and Addiction Services developed a group-based GD treatment manual for adults with co-occurring disorders. Over the course of 5 years, 353 individuals engaged in at least some of the manual's 12 weekly modules, and more than one-third (n = 122) completed the entire curriculum. Participants who completed all 12 modules completed pre-and post-tests, and after controlling for covariates, participants significantly decreased their GD symptom severity, though changes in self-esteem and gambling urges were non-significant. These findings suggest the treatment manual holds promise at reducing gambling behaviors for individuals with co-occurring disorders, but further research is warranted to explore best practices on how to intervene on the psychological antecedents to gambling in this population.