Estimating HIV incidence in voluntary counseling and testing clients in Uganda (1992-2003).

Objectives: To estimate HIV incidence from first-time testers among voluntary counseling and testing (VCT) clients in Uganda.

Methods: Data on 203,000 VCT clients tested from 1992 through 2003 were adjusted for temporal changes in the testing population. Differential mortality rates by HIV status were used to derive expected prevalence at future times from baseline prevalence within 5-year birth cohorts.