27 January 2021 - Late treatment study
Colchicine for community-treated patients with COVID-19 (COLCORONA): a phase 3, randomised, double-blinded, adaptive, placebo-controlled, multicentre trial
et al., The Lancet Respiratory Medicine, doi:10.1016/S2213-2600(21)00222-8 (preprint 1/27) (Peer Reviewed)
RCT for relatively low risk outpatients, 2235 treated with colchicine a mean of 5.3 days after the onset of symptoms, and 2253 controls, showing lower mortality, ventilation, and hospitalization with treatment. NCT04322682.
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risk of death, 43.9% lower, RR 0.56, p = 0.30, treatment 5 of 2,235 (0.2%), control 9 of 2,253 (0.4%), NNT 569, odds ratio converted to relative risk.
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risk of mechanical ventilation, 46.8% lower, RR 0.53, p = 0.09, treatment 11 of 2,235 (0.5%), control 21 of 2,253 (0.9%), NNT 227, odds ratio converted to relative risk.
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risk of hospitalization, 20.0% lower, RR 0.80, p = 0.09, treatment 101 of 2,235 (4.5%), control 128 of 2,253 (5.7%), NNT 86, odds ratio converted to relative risk.
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| Effect extraction follows pre-specified rules prioritizing more serious outcomes. |
Tardif et al., 1/27/2021, Double Blind Randomized Controlled Trial, Canada, North America, peer-reviewed, 44 authors, average treatment delay 5.3 days.
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