Evidence-based planning of a randomized controlled trial on diaphragm use for prevention of sexually transmitted infections.

Objectives: We conducted formative research to evaluate the acceptability and feasibility of continuous diaphragm use among low-income women highly exposed to sexually transmitted infections (STIs) in Madagascar.

Goal: To identify potential obstacles to researching the effectiveness of diaphragm use for STI prevention in a randomized controlled trial.

Study Design: Mixed methods to collect complex information.