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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Case 41% Improvement Relative Risk Case (b) 50% Symptomatic case 44% c19hcq.com/dhibar.html Favors HCQ Favors control
6 November 2020 - Post Exposure Prophylaxis study (treated after exposure to the virus)
Post Exposure Prophylaxis with Hydroxychloroquine (HCQ) for the Prevention of COVID-19, a Myth or a Reality? The PEP-CQ Study
Dhibar et al., International Journal of Antimicrobial Agents, doi:10.1016/j.ijantimicag.2020.106224 (Peer Reviewed)
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41% reduction in cases with HCQ PEP. Prospective open label trial with 132 HCQ patients and 185 control patients showing RR 0.59, p=0.03. 50% reduction in PCR+ cases, 44% reduction in symptomatic cases. No serious adverse events. Relatively low dosage, the PEP group received HCQ 800mg on day one followed by 400mg once weekly for 3 weeks. NCT04408456.
risk of case, 41.0% lower, RR 0.59, p = 0.03, treatment 14 of 132 (10.6%), control 36 of 185 (19.5%), NNT 11, adjusted per study.
risk of case, 50.0% lower, RR 0.50, p = 0.04, treatment 10 of 132 (7.6%), control 28 of 185 (15.1%), NNT 13, adjusted per study, PCR+.
risk of symptomatic case, 43.9% lower, RR 0.56, p = 0.21, treatment 6 of 132 (4.5%), control 15 of 185 (8.1%), NNT 28, adjusted per study.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Dhibar et al., 11/6/2020, prospective, India, South Asia, peer-reviewed, 13 authors.
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