Use of hydroxychloroquine in hospitalised COVID-19 patients is associated with reduced mortality: Findings from the observational multicentre Italian CORIST study

8/25 Late treatment study

Di Castelnuovo et al., European J. Internal Medicine, doi:10.1016/j.ejim.2020.08.019 (Peer Reviewed)
Use of hydroxychloroquine in hospitalised COVID-19 patients is associated with reduced mortality: Findings from the observational multicentre Italian CORIST study

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Retrospective 3,451 hospitalized patients, 30% reduction in mortality with HCQ after propensity adjustment, HR 0.70 [0.59 - 0.84].

Di Castelnuovo et al., 8/25/2020, retrospective, Italy, Europe, peer-reviewed, 110 authors.

risk of death, 30.0% lower, RR 0.70, p < 0.001, treatment 386 of 2634 (14.7%), control 90 of 817 (11.0%), adjusted per study.

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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