title: Efficacy of computer technology-based HIV prevention interventions: a meta-analysis.
abstract: OBJECTIVE
  To conduct a meta-analysis of computer technology-based HIV prevention behavioral interventions aimed at increasing condom use among a variety of at-risk populations.
  
  
  METHODS
  Systematic review and meta-analysis of existing published and unpublished studies testing computer-based interventions.
  
  
  METHODS
  Meta-analytic techniques were used to compute and aggregate effect sizes for 12 randomized controlled trials that met inclusion criteria. Variables that had the potential to moderate intervention efficacy were also tested.
  
  
  RESULTS
  The overall mean weighted effect size for condom use was d = 0.259 (95% confidence interval = 0.201, 0.317; Z = 8.74, P < 0.001; N = 4639), indicating a statistically significant impact of the interventions. This effect size compares favorably to previously tested interventions delivered by human facilitators. Statistically significant effect sizes were also found for frequency of sexual behavior, number of partners, and incident sexually transmitted diseases. In addition, interventions were significantly more efficacious when they were directed at men or women (versus mixed sex groups), utilized individualized tailoring, used a Stages of Change model, and had more intervention sessions.
  
  
  CONCLUSIONS
  Computer technology-based HIV prevention interventions have similar efficacy to more traditional human-delivered interventions. Given their low cost to deliver, ability to customize intervention content, and flexible dissemination channels, they hold much promise for the future of HIV prevention.
authors.affiliation: Department of Communication, University of Kentucky, 248 GrehanBuilding, Lexington, KY 40506-0042, USA. snoar2@uky.edu
authors.forename: Seth M
authors.initials: SM
authors.lastname: Noar
authors.forename: Hulda G
authors.initials: HG
authors.lastname: Black
authors.forename: Larson B
authors.initials: LB
authors.lastname: Pierce
mesh_terms: D003194:Computer-Assisted Instruction / Q000379:methods*; D017280:Condoms / Q000706:statistics & numerical data; D015658:HIV Infections / Q000517:prevention & control* / Q000635:transmission; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D020407:Internet; D017063:Outcome Assessment, Health Care / Q000379:methods; D012309:Risk-Taking; D021841:Safe Sex