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Cost-effectiveness of a community-level HIV risk reduction intervention.

S D Pinkerton, D R Holtgrave, W J DiFranceisco, L Y Stevenson and J A Kelly

Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, Milwaukee 53226, USA.

OBJECTIVES: The authors evaluated the cost-effectiveness of a community-level HIV prevention intervention that used peer leaders to endorse risk reduction among gay men. METHODS: A mathematical model of HIV transmission was used to translate reported changes in sexual behavior into an estimate of the number of HIV infections averted. RESULTS: The intervention cost $17,150, or about $65,000 per infection averted, and was therefore cost-saving, even under very conservative modeling assumptions. CONCLUSIONS: For this intervention, the cost of HIV prevention was more than offset by savings in averted future medical care costs. Community-level interventions to prevent HIV transmission that use existing social networks can be highly cost-effective.

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