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HCQ study #203 of 260
12/1 Late treatment study
Capsoni et al., Research Square, doi:10.21203/ (Preprint)
CPAP Treatment In COVID-19 Patients: A Retrospective Observational Study In The Emergency Department
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Small 52 patient retrospective study of patients with acute respiratory failure showing lower rates of intubation with HCQ.

Capsoni et al., 12/1/2020, retrospective, Italy, Europe, preprint, 13 authors.
risk of ventilation, 40.0% lower, RR 0.60, p = 0.30, treatment 12 of 40 (30.0%), control 6 of 12 (50.0%).

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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