Retention in care prior to antiretroviral treatment eligibility in sub-Saharan Africa: a systematic review of the literature

OBJECTIVE We aimed at summarising rates and factors associated with retention in HIV care prior to antiretroviral treatment (ART) eligibility in sub-Saharan Africa. DESIGN We conducted a systematic literature review (2002-2014). We searched Medline/Pubmed, Scopus and Web of Science, as well as proceedings of conferences. We included all original research studies published in peer-reviewed journals, which used quantitative indicators of retention in care prior to ART eligibility. PARTICIPANTS People not yet eligible for ART. PRIMARY AND SECONDARY OUTCOMES Rate of retention in HIV care prior to ART eligibility and associated factors. RESULTS 10 papers and 2 abstracts were included. Most studies were conducted in Southern and Eastern Africa between 2004 and 2011 and reported retention rates in pre-ART care up to the second CD4 measurement. Definition of retention in HIV care prior to ART eligibility differed substantially across studies. Retention rates ranged between 23% and 88% based on series ranging from 112 to 10,314 individuals; retention was higher in women, individuals aged >25 years, those with low CD4 count, high body mass index or co-infected with tuberculosis, and in settings with free cotrimoxazole use. CONCLUSIONS Retention in HIV care prior to ART eligibility in sub-Saharan Africa has been insufficiently described so far leaving major research gaps, especially regarding long-term retention rates and sociodemographic, economic, clinical and programmatic logistic determinants. The prospective follow-up of newly diagnosed individuals is required to better evaluate attrition prior to ART eligibility among HIV-infected people.