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  • Ive, Prudence  (2)
  • Wellington, Maureen  (2)
  • 2020-2024  (2)
  • 1
    In: AIDS, Ovid Technologies (Wolters Kluwer Health), Vol. 34, No. 10 ( 2020-08-1), p. 1559-1566
    Abstract: To achieve viral suppression among more than 90% of people on antiretroviral therapy (ART), improved understanding is warranted of the modifiable causes of HIV viremic episodes. We assessed the relative contributions of drug-resistance, nonadherence and low-level viremia (LLV) (viral load 50–999 cps/ml) on viremic episodes in sub-Saharan Africa. Methods: In a multicountry adult cohort initiating nonnucleoside reverse transcriptase inhibitor-based first-line ART, viremic episodes (viral load ≥1000 cps/ml) were classified as first, viral nonsuppression at 12 months; second, virological rebound at 24 months (after initial viral suppression at 12 months); third, failure to achieve viral resuppression at 24 months (after viremic episode at 12 months). We used adjusted odds ratios from multivariable logistic regression to estimate attributable fractions for each risk factor. Results: Of 2737 cohort participants, 1935 had data on pretreatment drug resistance (PDR) and at least 1 viral load outcome. Viral nonsuppression episodes [173/1935 (8.9%)] were attributable to nonadherence in 30% (35% in men vs. 24% in women) and to PDR to nonnucleoside reverse transcriptase inhibitors in 10% (15% in women vs. 6% in men). Notably, at contemporary PDR prevalences of 10–25%, PDR would explain 13–30% of viral nonsuppression. Virological rebound episodes [96/1515 (6.3%)] were mostly attributable to LLV (29%) and nonadherence (14%), and only rarely to PDR (1.1%). Failures to achieve viral resuppression [66/81 (81.5%)] were mostly attributable to the presence of acquired drug resistance (34%) and only rarely to nonadherence (2.4%). Conclusion: Effective adherence interventions could substantially reduce viral nonsuppression (especially in men) and virological rebound (especially during LLV), but would have limited effect on improving viral resuppression. Alternative ART regimens could circumvent PDR and acquired resistance.
    Type of Medium: Online Resource
    ISSN: 0269-9370 , 1473-5571
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
    detail.hit.zdb_id: 2012212-3
    Location Call Number Limitation Availability
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  • 2
    In: AIDS, Ovid Technologies (Wolters Kluwer Health), Vol. 36, No. 10 ( 2022-08-1), p. 1437-1447
    Abstract: In a multicountry prospective cohort of persons with HIV from six countries between 2007 and 2015, we evaluated long-term outcomes of first-line non-nucleoside reverse-transcriptase inhibitor-based antiretroviral therapy (ART), and risk factors for loss-to-follow-up, mortality, virological failure, and incomplete CD4 + T-cell recovery. Methods: We calculated cumulative incidence of lost-to-follow-up, death, virological failure (VL ≥ 1000 cps/ml) and incomplete CD4 + T-cell recovery ( 〈 500 cells/μl) at successive years, using Kaplan–Meier and Cox regression. Results: Of 2735 participants, 58.0% were female, median age was 37 (interquartile range [IQR] 32–43) years, and median pre-ART CD4 + T-cell count was 135 (IQR 63–205)/μl. Total follow-up time was 7208 person-years (median 24.3 months, IQR 18.7–58.3). Deaths by any cause and loss to follow-up occurred mostly during the first year of ART (84%, 201/240 and 56%, 199/353, respectively). During their first 6 years of ART, 71% (95% confidence interval [CI] 69.0–73.7) were retained on first-line, and among those 90–93% sustained viral suppression ( 〈 1000 cps/ml); CD4 + T-cell recovery was incomplete in 60% (220/363) of participants. The risk factors associated with poor outcomes during long-term ART were: for loss-to-follow-up, recent VL ≥1000 cps/ml, recent CD4 + T-cell count ≤50 cells/μl, age 〈 30 years, being underweight; for mortality, recent CD4 + T-cell count ≤50 cells/μl; and, for virological failure, age 〈 40 years, recent CD4 + T-cell count ≤200 cells/μl, poor adherence, male sex, and low-level viremia. Conclusion: To achieve long-term ART success towards the UNAIDS targets, early ART initiation is crucial, coupled with careful monitoring and retention support, particularly in the first year of ART. Male and youth-centred care delivery models are needed to improve outcomes for those vulnerable groups.
    Type of Medium: Online Resource
    ISSN: 0269-9370 , 1473-5571
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
    detail.hit.zdb_id: 2012212-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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