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HCQ study #74 of 255
6/29 Late treatment study
Sosa-GarcĂ­a et al., Cir Cir. 2020, 88:5, 569-575, doi:10.24875/CIRU.20000675 (Peer Reviewed)
Experience in the management of severe COVID-19 patients in an intensive care unit
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Small retrospective study of 56 ICU patients in Mexico showing HCQ RR 1.1, p = 1.0.

Sosa et al., 6/29/2020, retrospective, Mexico, North America, peer-reviewed, baseline oxygen requirements 100.0%, 6 authors.
risk of death, 10.5% higher, RR 1.11, p = 1.00, treatment 7 of 38 (18.4%), control 3 of 18 (16.7%).

Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
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