The researchers examined data from 658 male gamblers attending a residential treatment facility for disordered gambling in the UK. Just over half of the gamblers dropped out of treatment early. Predictors of treatment dropout included: older age (over 26), higher education, higher debts, online gambling, gambling on poker, shorter treatment program, depression, and childhood trauma. Gamblers were less likely to drop out of treatment if they had received previous treatment and were taking medication. Among the gamblers who dropped out of treatment, predictors of being asked to leave (i.e., enforced dropout) were: ever being homeless in their lifetime, gambling on sports, smoking, and depression.