Measuring retention in HIV care: the impact of data sources and definitions using routine data

Objectives: Measuring retention is critical for antiretroviral therapy (ART) management and program monitoring; however, many definitions and data sources, usually from single health facilities, are used. We used routine electronic data, linked across facilities, to examine the impact of definitions and data sources on retention estimates among women in Cape Town, South Africa. Design: Retrospective cohort study. Methods: We compiled routine...