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Browsing by Author "Westfall, Andrew O"

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Estimating loss to follow-up in HIV-infected patients on antiretroviral therapy: the effect of the competing risk of death in Zambia and Switzerland

Author: Schöni-Affolter, Franziska ; Keiser, Olivia ; Mwango, Albert ; Stringer, Jeffrey ; Ledergerber, Bruno ; Mulenga, Lloyd ; Bucher, Heiner C ; Westfall, Andrew O ; Calmy, Alexandra ; Boulle, Andrew ; Chintu, Namwinga ; Egger, Matthias ; Chi, Benjamin H Date: 2011 BACKGROUND: Loss to follow-up (LTFU) is common in antiretroviral therapy (ART) programmes. Mortality is a competing risk (CR) for LTFU; however, it is often overlooked in cohort analyses. We examined how the CR of death affected LTFU estimates ... Read more c b
Health facility characteristics and their relationship to coverage of PMTCT of HIV services across four African countries: the PEARL study

Author: Ekouevi, Didier K ; Stringer, Elizabeth ; Coetzee, David ; Tih, Pius ; Creek, Tracy ; Stinson, Kathryn ; Westfall, Andrew O ; Welty, Thomas ; Chintu, Namwinga ; Chi, Benjamin H Date: 2012 BACKGROUND: Health facility characteristics associated with effective prevention of mother-to-child transmission of HIV (PMTCT) coverage in sub-Saharan are poorly understood. METHODOLOGY/PRINCIPAL FINDINGS: We conducted surveys in health ... Read more c b
Universal Definition of Loss to Follow-Up in HIV Treatment Programs: A Statistical Analysis of 111 Facilities in Africa, Asia, and Latin America

Author: Chi, Benjamin H ; Yiannoutsos, Constantin T ; Westfall, Andrew O ; Newman, Jamie E ; Zhou, Jialun ; Cesar, Carina ; Brinkhof, Martin W G ; Mwango, Albert ; Balestre, Eric ; Carriquiry, Gabriela Date: 2011 Background: Although patient attrition is recognized as a threat to the long-term success of antiretroviral therapy programs worldwide, there is no universal definition for classifying patients as lost to follow-up (LTFU). We analyzed data ... Read more c b

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Browsing by Author "Westfall, Andrew O"

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