Ferreira, 102 patient ivermectin late treatment study: 54% higher combined mortality/intubation [p=0.37] https://c19p.org/ferreira2
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Outcomes associated with Hydroxychloroquine and Ivermectin in hospitalized patients with COVID-19: a single-center experience
et al., Revista da Associação Médica Brasileira, doi:10.1590/1806-9282.20210661
Retrospective 230 hospitalized patients in Brazil showing no significant difference with ivermectin 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. Baseline total chest CT opacities was 20% for ivermectin vs. 15% for control. Dosage is unknown.
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risk of death, 5.0% higher, RR 1.05, p = 1.00, treatment 3 of 21 (14.3%), control 11 of 81 (13.6%).
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risk of death/intubation, 54.3% higher, RR 1.54, p = 0.37, treatment 6 of 21 (28.6%), control 15 of 81 (18.5%).
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risk of death/intubation/ICU, 62.4% higher, RR 1.62, p = 0.27, treatment 8 of 21 (38.1%), control 19 of 81 (23.5%).
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| Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates |
This study is excluded in the after exclusion results of meta
analysis:
unadjusted results with no group details, substantial unadjusted confounding by indication likely.
Ferreira et al., 11/26/2021, retrospective, Brazil, South America, peer-reviewed, 5 authors, study period 12 March, 2020 - 8 July, 2020, average treatment delay 7.0 days, dosage not specified.
Late treatment
is less effective
is less effective
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