title: An outcome evaluation to measure changes in sexual risk-taking among gay men undergoing substance use disorder treatment.
abstract: OBJECTIVE
  To evaluate the effects of safe sex intervention at a substance use disorder treatment agency designed to serve gay men.
  
  
  METHODS
  Of all eligible men, 456 (78%) were recruited as they entered treatment for a substance use disorder. This cohort was followed for five waves of data collection, each wave measuring the previous 90 days. Assigned to the experimental condition (treatment for substance use disorder plus a safe sex intervention) were 82 men; 65 were assigned to the regular substance use disorder treatment.
  
  
  RESULTS
  Although levels of risk within each wave were never significantly different between the two treatment groups, reductions in unprotected anal intercourse (UAI) with a nonmonogamous partner for both groups from the baseline Wave-1 levels were uniformly significant (all p's < .05). Such high-risk sex in the year-long follow-up period was correlated with UAI reported at intake, enjoyment of UAI, relative youth, heavier concurrent use of alcohol or amphetamines and greater numbers of sexual partners.
  
  
  CONCLUSIONS
  We conclude that: (1) substantial HIV risk reductions can occur after initiation of treatment for substance use disorder among gay men; (2) risk reductions begin soon after treatment begins; (3) lapses to unsafe sex are common during treatment; (4) continued UAI is most likely among those men who are riskier at intake, who continue to be more sexually active and who are more likely to combine substance use and sexual behavior; (5) AIDS prevention activities conducted at treatment agencies cannot reach all high-risk substance-using gay men.
authors.affiliation: Center for AIDS Prevention Studies, University of California, San Francisco 94105, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Stall
authors.forename: J P
authors.initials: JP
authors.lastname: Paul
authors.forename: D C
authors.initials: DC
authors.lastname: Barrett
authors.forename: G M
authors.initials: GM
authors.lastname: Crosby
authors.forename: E
authors.initials: E
authors.lastname: Bein
mesh_terms: D000293:Adolescent; D000328:Adult; D000428:Alcohol Drinking / Q000517:prevention & control* / Q000523:psychology; D015331:Cohort Studies; D015658:HIV Infections / Q000517:prevention & control*; D018451:Homosexuality, Male / Q000208:ethnology / Q000523:psychology*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D017063:Outcome Assessment, Health Care; D012309:Risk-Taking; D012725:Sexual Behavior / Q000523:psychology*; D019966:Substance-Related Disorders / Q000517:prevention & control* / Q000523:psychology; D011795:Surveys and Questionnaires