Retrospective 258 hospitalized patients in Italy showing lower mortality with HCQ treatment, unadjusted relative risk RR 0.455,
p<0.001.
(data is in the supplementary appendix)
Boari et al., 11/17/2020, retrospective, Italy, Europe, peer-reviewed, 20 authors.
risk of death, 54.5% lower, RR 0.45, p < 0.001, treatment 41 of 202 (20.3%), control 25 of 56 (44.6%).