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- W2026695087 abstract "Introduction For some patients, it remains a challenge to achieve complete virological suppression which is the goal of antiretroviral therapy (ART). Identifying factors associated with low‐level viraemia (LLV) and virological failure (VF) under ART might help to optimize management of these patients. Materials and Methods We investigated patients from the Austrian HIV Cohort Study receiving unmodified ART for >6 months with two nucleoside reverse‐transcriptase inhibitors (NRTIs) with either a non‐nucleoside reverse‐transcriptase inhibitor (NNRTI) or a boosted protease inhibitor (PI) or an integrase inhibitor (INSTI) between 1 July 2012 and 1 July 2013 with at least one viral load (VL) measurement below the limit of detection (BLD) or below level of quantification (BLQ) in their treatment history. VF was defined as HIV‐RNA levels ≥200 copies/mL and all other quantifiable measurements were classified as LLV. Factors associated with LLV and VF compared to BLD and BLQ were identified by using logistic regression models. Results Of the 2,276 patients analyzed, 1,972 (86.6%) were BLD or BLQ, 222 (9.8%) showed LLV and 82 (3.6%) had VF. A higher risk for LLV and VF was found in patients with ART interruptions and in patients with boosted PI therapy. The risk for LLV and VF was lower in patients from a centre which uses Abbott RealTime HIV‐1 assay compared to the other centres measuring VL by the Roche Cobas AmpliPrep/Cobas TaqMan 2.0. A higher risk for LLV but not for VF was found in patients with a higher VL before ART and shorter ART duration. A higher risk for VF but not for LLV was found in patients of younger age, originating from a high prevalence country, with a lower CD4 count and in male injecting drug users. Conclusions This study of well‐defined patients on stable ART over a period of more than six months gives insights into the different factors associated with LLV and VF. In patients with VF, factors associated with adherence play a prominent role, whereas in patients with LLV, the biology of viral replication comes additionally into effect. Despite its observational design, it has implications for patient management and forms the basis for future outcome studies." @default.
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- W2026695087 date "2014-11-01" @default.
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- W2026695087 title "Difference in factors associated with low-level viraemia and virological failure: results from the Austrian HIV Cohort Study" @default.
- W2026695087 doi "https://doi.org/10.7448/ias.17.4.19667" @default.
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