Virological suppression and clinical management in response to viremia in South African HIV treatment program: A multicenter cohort study
Autoři:
Lucas E. Hermans aff001; Sergio Carmona aff004; Monique Nijhuis aff001; Hugo A. Tempelman aff003; Douglas D. Richman aff007; Michelle Moorhouse aff002; Diederick E. Grobbee aff003; Willem D. F. Venter aff002; Annemarie M. J. Wensing aff001
Působiště autorů:
Virology, Department of Medical Microbiology, University Medical Center Utrecht (UMCU), Utrecht, the Netherlands
aff001; Wits Reproductive Health and HIV Institute (Wits RHI), University of the Witwatersrand, Johannesburg, South Africa
aff002; Ndlovu Research Consortium, Elandsdoorn, South Africa
aff003; Department of Molecular Medicine and Haematology, University of the Witwatersrand, Johannesburg, South Africa
aff004; National Health Laboratory Service (NHLS), Johannesburg, South Africa
aff005; University of the Witwatersrand, Johannesburg, South Africa
aff006; Center for AIDS Research, University of California San Diego, United States of America
aff007; VA San Diego Healthcare System, California, United States of America
aff008; Clinical Epidemiology, University Medical Center Utrecht (UMCU), Utrecht, the Netherlands
aff009; Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands
aff010
Vyšlo v časopise:
Virological suppression and clinical management in response to viremia in South African HIV treatment program: A multicenter cohort study. PLoS Med 17(2): e1003037. doi:10.1371/journal.pmed.1003037
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pmed.1003037
Souhrn
Background
Uptake of antiretroviral treatment (ART) is expanding rapidly in low- and middle-income countries (LMIC). Monitoring of virological suppression is recommended at 6 months of treatment and annually thereafter. In case of confirmed virological failure, a switch to second-line ART is indicated. There is a paucity of data on virological suppression and clinical management of patients experiencing viremia in clinical practice in LMIC. We report a large-scale multicenter assessment of virological suppression over time and management of viremia under programmatic conditions.
Methods and findings
Linked medical record and laboratory source data from adult patients on first-line ART at 52 South African centers between 1 January 2007 and 1 May 2018 were studied. Virological suppression, switch to second-line ART, death, and loss to follow-up were analyzed. Multistate models and Cox proportional hazard models were used to assess suppression over time and predictors of treatment outcomes. A total of 104,719 patients were included. Patients were predominantly female (67.6%). Median age was 35.7 years (interquartile range [IQR]: 29.9–43.0). In on-treatment analysis, suppression below 1,000 copies/mL was 89.0% at month 12 and 90.4% at month 72. Suppression below 50 copies/mL was 73.1% at month 12 and 77.5% at month 72. Intention-to-treat suppression was 75.0% and 64.3% below 1,000 and 50 copies/mL at month 72, respectively. Viremia occurred in 19.8% (20,766/104,719) of patients during a median follow-up of 152 (IQR: 61–265) weeks. Being male and below 35 years of age and having a CD4 count below 200 cells/μL prior to start of ART were risk factors for viremia. After detection of viremia, confirmatory testing took 29 weeks (IQR: 16–54). Viral resuppression to below 1,000 copies/mL without switch of ART occurred frequently (45.6%; 6,030/13,210) but was associated with renewed viral rebound and switch. Of patients with confirmed failure who remained in care, only 41.5% (1,872/4,510) were switched. The median time to switch was 68 weeks (IQR: 35–127), resulting in 12,325 person-years spent with a viral load above 1,000 copies/mL. Limitations of this study include potential missing data, which is in part addressed by the use of cross-matched laboratory source data, and the possibility of unmeasured confounding.
Conclusions
In this study, 90% virological suppression below the threshold of 1,000 copies/mL was observed in on-treatment analysis. However, this target was not met at the 50-copies/mL threshold or in intention-to-treat analysis. Clinical management in response to viremia was profoundly delayed, prolonging the duration of viremia and potential for transmission. Diagnostic tools to establish the cause of viremia are urgently needed to accelerate clinical decision-making.
Klíčová slova:
African people – Antiretroviral therapy – Antiretrovirals – Data management – HIV epidemiology – T cells – Viral load – Viremia
Zdroje
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