Abstract
Background: Methamphetamine-dependent gay and bisexual men (GBM) are at high risk for HIV transmission, largely due to drug-associated sexual risk behaviors. This project evaluated the efficacy of four behavioral drug abuse treatments for reducing methamphetamine use and sexual risk behaviors among this population. Methods: In this randomized controlled trial, 162 methamphetamine-dependent (SCID-verified) GBM in Los Angeles County were randomly assigned to one of four treatment conditions for 16 weeks: standard cognitive behavioral therapy (CBT, n = 40), contingency management (CM, n = 42), combined cognitive behavioral therapy and contingency management (CBT + CM, n = 40), and a culturally tailored cognitive behavioral therapy (GCBT, n = 40). Stimulant use was assessed thrice-weekly during treatment using urine drug screens (48 measures). Sexual risk behaviors were monitored monthly (four measures). Follow-up assessments were conducted at 6 (80.0%) and 12 months (79.9%). Results: Statistically significant differences in retention ( F(3,158) = 3.78, p < .02), in longest period of consecutive urine samples negative for methamphetamine metabolites ( F(3,158) = 11.80, p < .001), and in the Treatment Effectiveness Score were observed by condition during treatment ( F(3,158) = 7.35, p < .001) with post hoc analyses showing the CM and CBT + CM conditions to perform better than standard CBT. GEE modeling results showed GCBT significantly reduced unprotected receptive anal intercourse (URAI) during the first 4 weeks of treatment ( X 2 = 6.75, p < .01). During treatment between-group differences disappeared at follow-up with overall reductions in outcomes sustained to 1-year. Conclusions: Among high-risk methamphetamine-dependent GBM, drug abuse treatments produced significant reductions in methamphetamine use and sexual risk behaviors. Drug abuse treatments merit consideration as a primary HIV prevention strategy for this population.
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