Antiretroviral Refill Histories as a Predictor of Future Human Immunodeficiency Virus Viremia.

Background: The use of adherence measures as markers for virologic failure (VF) has been studied. Yet, there is currently no single adherence metric recommended for VF. Antiretroviral prescription refill histories, for people living with human immunodeficiency virus (HIV), are readily accessible and can be easily quantified to an estimated adherence level.