"Wamepotea" (they have become lost): outcomes of HIV-positive and HIV-exposed children lost to follow-up from a large HIV treatment program in western Kenya.

Objective: The objective of this study was to identify the vital status and reasons for children becoming loss to follow-up (LTFU) from a large program in western Kenya.

Methods: This was a prospective evaluation of a random sample of 30% of HIV-exposed and HIV-positive children LTFU from either an urban or rural HIV Academic Model Providing Access to Healthcare clinic. LTFU is defined as absence from clinic for >6 months if on combination antiretroviral therapy and > 12 months if not.