The DT+ intervention served people experiencing homelessness who had (1) a diagnosis of cocaine or multisubstance dependence that included cocaine use and (2) a coexisting nonpsychotic mental disorder. Participants had access to (1) eight weeks of behavioral day treatment, including lunch and transportation, followed by weekly group therapy; (2) housing; (3) support with setting goals related to employment and housing; (4) vocational counseling; and (5) referrals to job opportunities.