Use of antiretroviral therapy in low- and middle-income countries: Edited by Julian Elliott and Jonathan M. SchapiroEstimation of antiretroviral therapy coverage: methodology and trendsMahy, Marya; Tassie, Jean-Michelb; Ghys, Peter Da; Stover, Johnc; Beusenberg, Michelb; Akwara, Priscillad; Souteyrand, YvesbAuthor Information aUNAIDS, Epidemiology and Analysis Division, Switzerland bWHO, HIV/AIDS Department, Geneva, Switzerland cFutures Institute, Glastonbury, Connecticut, USA dUNICEF, Strategic Information Section, New York, New York, USA Correspondence to Mary Mahy, Epidemiology and Analysis Division, UNAIDS, 20 avenua Appia, CH-1211 Geneva 27, Switzerland Tel: +41 22 791 4601; e-mail: firstname.lastname@example.org Current Opinion in HIV and AIDS: January 2010 - Volume 5 - Issue 1 - p 97-102 doi: 10.1097/COH.0b013e328333b892 Buy Metrics Abstract Purpose of review To present the methodology used to calculate coverage of antiretroviral therapy (ART) and review global and regional trends in ART coverage. Recent findings There has been a steady increase in ART coverage over the last decade with a more rapid increase in recent years. Current estimates of ART coverage are 43% for adults and 38% for children (ages 0–14 years). Methods for calculating coverage rely on good-quality patient monitoring systems in countries, and well informed models are needed to estimate the number of people in need of treatment. Summary The estimated coverage rates show that ART programs have improved over the past 8 years; however, approximately 58% (53–60%) of those people in need of ART are still not on treatment. High quality data are needed to accurately measure changes in ART coverage. © 2010 Lippincott Williams & Wilkins, Inc.