Size Estimation Validation Study in Region 4, Guyana

This study was designed to validate existing KP size estimates in Guyana’s Region 4 that had been developed using national-level BBSS size estimates. The BBSS estimates were based on individual-level interview data along with spot verification data collected according to the standard Priorities for Local AIDS Control Efforts (PLACE) method. (The general PLACE protocol can be found in English at https://www.measureevaluation.org/resources/tools/hiv-aids/place.) It was decided that the validation efforts would focus on Region 4, because that region has a high concentration of key populations and USAID support for KP activities. The study calculated and validated size estimates for FSWs, MSM, and TG women through site visits and individual interviews. The focus was on these three groups because they are the populations studied in the BBSS and they have programmatic importance in the fight against the HIV epidemic in Guyana.