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- W2895586456 abstract "We examined associations of 25-hydroxy vitamin D (25-OHD), tenofovir disoproxil fumarate (TDF), and bone toxicity. We studied TDF/emtricitabine (FTC) HIV pre-exposure prophylaxis (PrEP) in young men who have sex with men (YMSM). Bone toxicity was predefined using bone mineral density/content change from baseline to week 48. Baseline serum 25-OHD was dichotomized as <20 ng/mL (insufficient/deficient) versus ≥20 (sufficient), and week 48 dried blood spot tenofovir diphosphate (TFV-DP) as >700 fmol/punch (protective against HIV acquisition) versus ≤700. Associations were examined by univariate and multivariable logistic regression, reporting crude and adjusted odds ratios (ORs), with 95% confidence intervals (CIs). Of 101 enrolled, 69 had complete bone assessments and 25-OHD; of these, 59 had week 48 TFV-DP data. Median (Q1–Q3) age was 20 (18–21) years; 54% were black/African American. In univariate analysis, participants with baseline 25-OHD <20 ng/mL (OR = 5.4; 95% CI = 1.9–16.5) and blacks (OR = 4.9; 95% CI = 1.7–15.2) had greater odds of bone toxicity than those with 25-OHD ≥20 or other races. TFV-DP was not associated with bone toxicity (OR = 1.6; 95% CI = 0.5–5.5). In multivariable analysis, compared with those with 25-OHD ≥20 and TFV-DP ≤700, those with 25-OHD ≥20 and TFV-DP >700 (OR = 11.5; 95% CI = 1.4–169.6), 25-OHD <20 and TFV-DP ≤700 (OR = 19.4; 95% CI = 3.0–228.7), and 25-OHD <20 and TFV-DP >700 (OR = 32.3; 95% CI = 3.3–653.6) had greater odds of bone toxicity after adjusting for race. In multivariable models, 25-OHD insufficiency, protective TFV-DP concentrations, and black race were significantly associated with bone toxicity after 48 weeks of TDF/FTC PrEP in YMSM. Clinical Trials Registration: NCT01769469." @default.
- W2895586456 created "2018-10-12" @default.
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- W2895586456 date "2019-02-01" @default.
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- W2895586456 title "Short Communication: Association of Vitamin D Insufficiency and Protective Tenofovir Diphosphate Concentrations with Bone Toxicity in Adolescent Boys and Young Men Using Tenofovir Disoproxil Fumarate/Emtricitabine for HIV Pre-Exposure Prophylaxis" @default.
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- W2895586456 doi "https://doi.org/10.1089/aid.2018.0096" @default.
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