Outcomes of HIV-exposed children in western Kenya: efficacy of prevention of mother to child transmission in a resource-constrained setting.

Objectives: To compare rates of mother to child transmission of HIV and infant survival in women-infant dyads receiving different interventions in a prevention of Mother to Child Transmission (pMTCT) program in western Kenya.

Design: Retrospective cohort study using prospectively collected data stored in an electronic medical record system.

Setting: Eighteen HIV clinics in western Kenya.