Cost-effectiveness of male circumcision in reducing the spread of HIV in the general population in sub-Saharan Africa Jim Kahn & Elliot Marseille, UCSF.

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Presentation transcript:

Cost-effectiveness of male circumcision in reducing the spread of HIV in the general population in sub-Saharan Africa Jim Kahn & Elliot Marseille, UCSF Bertran Auvert, University of Versailles XVI International AIDS Conference 15 August 2006

Background RCT in Orange Farm showed a protective effect for adult male circumcision of 60%, consistent with observational studies. Resources for HIV prevention are limited, and the economics of a biological intervention of this type are unknown.

Goals Assess the cost-effectiveness of MC for Gauteng Province, South Africa Use the analysis model to estimate cost- effectiveness in sub-Saharan African settings with different epidemiology or costs.

MC CEA Outcomes HIV Infections averted Cost per HIV infection averted –Unadjusted for averted lifetime cost of HIV treatment –Adjusted for averted lifetime cost of HIV treatment

MC CEA inputs Cost of each MC, including promotion Frequency and cost of side effects HIV prevalence and incidence in men Protective effect of MC Reduction of protective effect due to risk compensation Multiplier effects due to epidemic dynamics, e.g. protection to women Savings from medical costs averted

CE base case input values MC $55 each, mild side effects 5% / $13, serious side effects 0.4% / $334 HIV prevalence 25.6%, incidence 3.8 /100/yr Protective effect 60% female to male Risk compensation 25% Epidemic multiplier 1.5 No effect on male to female riskiness or MTCT. Lifetime cost of HIV treatment $ years

CE base case results Program cost per MC Cost of male circumcision$ Cost of adverse events$ 1.03 Total cost$ HIV infections averted per MC Undiscounted0.43 Discounted0.31 Cost-Effectiveness Cost per HIV infection averted (unadjusted for averted medical costs) $181 Net cost, adjusted for averted medical costs (savings) ($2,411)

Sensitivity of $ per HIV infection prevented to unit cost & protective effect Cost per male circumcision $30$50$100 Protective effect 40% % % % (all => net savings when adjusted for averted medical costs)

Alternate Epidemic Scenarios Base case: HIV prevalence 25.6%, incidence Lower steady state: With HIV prevalence = 8.4% & incidence = 0.01, cost per HIA is $551, with net savings of $753 per MC. Declining epidemic: With HIV prevalence = 25.6% but incidence = 0.01, cost per HIA is $1200, with net savings of $264 per MC. Focus on young men: Age 18-24, HIV prevalence = 10% and incidence = 0.021, cost per HIA = $135.

Program Scenarios Recruitment at $5 per eligible but only 10% coverage => $100 per MC performed, with net savings of $253 per MC. To reach net cost of $0, cost per MC must rise 45-fold to $2,466 (or protective effect must drop to 21%). Scale has <1% effect on impact (might lower costs)

Cost per HIV Infection Averted Across Prevention Interventions Adult MC$ 181 VCT $ PMTCT $ 20 – 21,000 Condoms $ 11 – 2108 Peer educa SWs$ 68 - $79 Mass media $ 58 Rx of STI$ $514 School-based$ 7,288 - $13,326

Conclusions Adult male circumcision in Sub-Saharan Africa appears to save money for a wide range of epidemic and economic conditions. As MC scales up, studies should identify how to most efficiently deliver it.