Objectives: To explore how the cost-effectiveness of a behavior-change STI prevention program varies with the phase of an STI epidemic.
Methods: We used a model of STI transmission and standard methods of cost-effectiveness analysis to examine the cost-effectiveness of a hypothetical, behavior-change intervention initiated at various phases of an STI epidemic.
Results: The intervention was more cost-effective when initiated in earlier phases of the epidemic rather than later phases, under a range of scenarios. However, the relative impact of the timing of the initiation of the STI prevention intervention on the cost- effectiveness was quite minor compared to other important factors, such as the cost and impact of the intervention and the lifetime medical cost of the STI.
Conclusions: Earlier initiation of an intervention can improve the cost-effectiveness of the intervention, although this result does not hold for all possible scenarios.
- sexually transmitted diseases