Second line anti-retroviral therapy failure in a pediatric cohort of an Ethiopian tertiary hospital: A retrospective observational study

Abstract

Background: Sub-Saharan Africa carries the largest burden of pediatric HIV infection. The extent and factors affecting the success of second line anti-retroviral treatment in the region have not been well-studied. This study aimed to determine the rate and determinants of failure of second line anti-retroviral treatment among children and adolescents on follow-up at an Ethiopian tertiary teaching hospital. Methods and materials: A retrospective observational cohort study was conducted at Tikur Anbessa Specialized Hospital, Addis Ababa, Ethiopia. Structured data abstraction forms were used to collect socio-demographic, clinical and diagnostic data. Descriptive statistics and bivariate analysis were used to describe the magnitude of the problem and its associations. Results: A total of 76 children and adolescents who were taking second line anti-retroviral treatment and had at least a single viral load determination while under care were analyzed. Their mean age was 16.1 years. Failure of second line anti-retroviral drugs was seen in 14 of the 76 while 4 of them fulfilled eligibility criteria for a switch to third line anti-retroviral treatment. The mean duration till virologic failure was 17.6 months. The mean CD4 and viral load upon requirement of a third line regimen was 612.2/mm3 and 82,131.3 copies/ml. Second line antiretroviral treatment virologic failure was significantly associated with the age of the child or adolescent. Conclusion: There was a high rate of virologic failure among children and adolescents under second line anti-retroviral drugs in our hospital. Our findings also highlight the need for provision of third line second line anti-retroviral drugs. Challenges for delivering a standard care were infrequent viral load testing and delayed initiation of second line treatment after confirming failure of first line regimens.