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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Case 26% Improvement Relative Risk c19hcq.com/dev.html Favors HCQ Favors control
24 March 2021 - Pre-Exposure Prophylaxis study (treated before exposed to the virus)
Risk factors and frequency of COVID-19 among healthcare workers at a tertiary care centre in India: a case–control study
Dev et al., Transactions of The Royal Society of Tropical Medicine and Hygiene, doi:10.1093/trstmh/trab047 (Peer Reviewed)
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Retrospective case control study of 3,100 healthcare workers in India showing lower cases with HCQ prophylaxis, and an inverse association between the number of HCQ doses taken and the risk of COVID-19 cases. Low risk population with no mortality and no severe cases.
risk of case, 26.0% lower, RR 0.74, p = 0.003, treatment 260, control 499, any number of HCQ doses vs. no HCQ prophylaxis.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Dev et al., 3/24/2021, retrospective, India, South Asia, peer-reviewed, 5 authors.
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