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Home   COVID-19 treatment studies for Hydroxychloroquine  COVID-19 treatment studies for HCQ  C19 studies: HCQ  HCQ   Select treatmentSelect treatmentTreatmentsTreatments
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0 0.5 1 1.5 2+ Mortality -151% Improvement Relative Risk Death/intubation -46% Death/intubation/ICU -61% c19hcq.org Ferreira et al. HCQ for COVID-19 LATE TREATMENT Is late treatment with HCQ beneficial for COVID-19? Retrospective 192 patients in Brazil (March - July 2020) Higher mortality with HCQ (p=0.03) Ferreira et al., Revista da Associação Médica Br.., doi:10.1590/1806-9282.20210661 Favors HCQ Favors control
Outcomes associated with Hydroxychloroquine and Ivermectin in hospitalized patients with COVID-19: a single-center experience
Ferreira et al., Revista da Associação Médica Brasileira, doi:10.1590/1806-9282.20210661
Ferreira et al., Outcomes associated with Hydroxychloroquine and Ivermectin in hospitalized patients with COVID-19: a.., Revista da Associação Médica Brasileira, doi:10.1590/1806-9282.20210661
Nov 2021   Source   PDF  
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Retrospective 230 hospitalized patients in Brazil showing higher mortality with HCQ treatment. Authors note that the treatments were more likely to be offered to sicker patients. Authors indicate that they do not know when medication was started, which in some cases could have been after ICU admission or intubation. Dosage is unknown.
risk of death, 151.5% higher, RR 2.51, p = 0.03, treatment 17 of 111 (15.3%), control 11 of 81 (13.6%), odds ratio converted to relative risk, multivariate.
risk of death/intubation, 45.9% higher, RR 1.46, p = 0.23, treatment 30 of 111 (27.0%), control 15 of 81 (18.5%).
risk of death/intubation/ICU, 61.3% higher, RR 1.61, p = 0.04, treatment 42 of 111 (37.8%), control 19 of 81 (23.5%).
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Ferreira et al., 26 Nov 2021, retrospective, Brazil, peer-reviewed, 5 authors, study period 12 March, 2020 - 8 July, 2020, average treatment delay 7.0 days, dosage not specified.
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Abstract: ORIGINAL ARTICLE https://doi.org/10.1590/1806-9282.20210661 Outcomes associated with Hydroxychloroquine and Ivermectin in hospitalized patients with COVID-19: a single-center experience Roberto Muniz Ferreira1,2* , Renata Wanderley Beranger1 , Pedro Paulo Noguères Sampaio1,2 , João Mansur Filho1 , Ricardo Antônio Correia Lima1,3 SUMMARY OBJECTIVE: Hydroxychloroquine and Ivermectin are advocated as potential treatments for coronavirus disease 2019 (COVID-19) despite the lack of supportive clinical evidence. In this study, outcomes associated with Hydroxychloroquine and/or Ivermectin were determined in a series of patients with confirmed COVID-19 from a single institution in Brazil. METHODS: Consecutive patients admitted between March and July 2020 were retrospectively analyzed and divided into four treatment categories: no treatment (Group 0), Ivermectin only (Group I), Hydroxychloroquine only (Group II), and Hydroxychloroquine and Ivermectin (Group III). Intensive care unit admission, mechanical ventilation, and death were compared between the Groups. RESULTS: A total of 230 patients were included, with the following treatment distribution: 35.2% (0), 9.1% (I), 48.3% (II), and 7.4% (III). Groups I, II, and III had the higher rates of Intensive care unit admission, mechanical ventilation, or death (0: 23.5% versus I: 38.1% versus II: 37.8% versus III: 70.6%, p=0.002), and the greatest mortality was found in Group III (0 versus III: 13.6% versus 35.3%, p=0.03). In the multivariate analysis, Hydroxychloroquine remained significantly associated with death (OR 3.3, 95%CI 1.1–9.6, p=0.03). CONCLUSION: In a series of consecutive hospitalized patients with COVID-19, Ivermectin was not associated with improved outcomes and Hydroxychloroquine may have resulted in a harmful effect. KEYWORDS: Coronavirus. Hydroxychloroquine. Ivermectin. Prognosis.
Late treatment
is less effective
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