Abstract
Research suggests that integrase strand transferase inhibitor use can lead to weight gain, and data from sub-Saharan countries are limited. This study investigated changes in weight in Namibians switched from tenofovir DF/emtricitabine/efavirenz (TEE) to tenofovir DF/lamivudine/dolutegravir (TLD). Longitudinal, retrospective, and quantitative study from outpatient records of Namibians living with HIV/AIDS switched from efavirenz-to dolutegravir-based regimen at four clinics. A linear mixed effects model predicting weight 6months prior to the switch, time of the switch, and at 6, 12-, and 18-months post-switch was run. A second analysis comparing change in weights between males and females was also run. 242 patients switched from TEE to TLD. Compared to patient weight at the time of the switch, weights were significantly higher at 6 (+0.9kg, p = 0.004), 12 (+1.7kg, p < 0.001), and 18months (+1.4kg, p < 0.001) post-switch. There was no significant weight change for males, but females had a significant weight gain at 12 (+1.58kg, p = 0.012) and 18months (+1.49kg, p = 0.024) post switch. Females living with HIV in Namibia gain weight when switched from TEE to TLD. Clinical implications on the development of cardiometabolic complications is unclear and mechanisms by which the weight gain occurs are unknown.
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