Sara N Levintow1, Brian W Pence2, Kimberly A Powers2, Alexander Breskin3, Teerada Sripaipan4, Tran Viet Ha5, Viet Anh Chu5, Vu Minh Quan6, Carl A Latkin7, Vivian F Go4. 1. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill NC, United States. Electronic address: levintow@email.unc.edu. 2. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill NC, United States. 3. NoviSci Inc., Durham NC, United States. 4. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill NC, United States. 5. UNC Project Vietnam, University of North Carolina, Hanoi, Vietnam. 6. Centers for Disease Control and Prevention, Atlanta GA, United States. 7. Department of Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore MD, United States.
Abstract
BACKGROUND: The burden of depression is high among people who inject drugs (PWID) and may contribute to the spread of HIV through poor treatment engagement and persistent viremia. We estimated the effects of depression on antiretroviral therapy (ART) initiation and viral suppression among PWID living with HIV. METHODS: Longitudinal data were collected from 455 PWID living with HIV in Vietnam during 2009-2013. We estimated the 6- and 12-month cumulative incidence of ART initiation and viral suppression, accounting for time-varying confounding, competing events, and missing data. The cumulative incidence difference (CID) contrasted the incidence of each outcome had participants always vs. never experienced severe depressive symptoms across study visits to date. RESULTS: Severe depressive symptoms decreased the cumulative incidence of ART initiation, with CID values comparing always vs. never having severe depressive symptoms of -7.5 percentage points (95% CI: -17.2, 2.2) at 6 months and -7.1 (95% CI: -17.9, 3.7) at 12 months. There was no appreciable difference in the cumulative incidence of viral suppression at 6 months (CID = 0.3, 95% CI: -11.3, 11.9) or 12 months (CID = 2.0, 95% CI: -21.8, 25.8). LIMITATIONS: Discrepancies between the ART initiation and viral suppression outcomes could be due to under-reporting of ART use and missing data on viral load. CONCLUSIONS: Future work probing the seemingly antagonistic effect of depression on treatment uptake - but not viral suppression - will inform the design of interventions promoting HIV clinical outcomes and reducing onward transmission among PWID.
BACKGROUND: The burden of depression is high among people who inject drugs (PWID) and may contribute to the spread of HIV through poor treatment engagement and persistent viremia. We estimated the effects of depression on antiretroviral therapy (ART) initiation and viral suppression among PWID living with HIV. METHODS: Longitudinal data were collected from 455 PWID living with HIV in Vietnam during 2009-2013. We estimated the 6- and 12-month cumulative incidence of ART initiation and viral suppression, accounting for time-varying confounding, competing events, and missing data. The cumulative incidence difference (CID) contrasted the incidence of each outcome had participants always vs. never experienced severe depressive symptoms across study visits to date. RESULTS: Severe depressive symptoms decreased the cumulative incidence of ART initiation, with CID values comparing always vs. never having severe depressive symptoms of -7.5 percentage points (95% CI: -17.2, 2.2) at 6 months and -7.1 (95% CI: -17.9, 3.7) at 12 months. There was no appreciable difference in the cumulative incidence of viral suppression at 6 months (CID = 0.3, 95% CI: -11.3, 11.9) or 12 months (CID = 2.0, 95% CI: -21.8, 25.8). LIMITATIONS: Discrepancies between the ART initiation and viral suppression outcomes could be due to under-reporting of ART use and missing data on viral load. CONCLUSIONS: Future work probing the seemingly antagonistic effect of depression on treatment uptake - but not viral suppression - will inform the design of interventions promoting HIV clinical outcomes and reducing onward transmission among PWID.
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