Retrospective 1255 patients in Spain showing lower mortality with HCQ. Subject to confounding by indication.
Rodriguez-Gonzalez et al., 11/28/2020, retrospective, Spain, Europe, peer-reviewed, 20 authors.
risk of death, 22.8% lower, RR 0.77, p = 0.26, treatment 251 of 1148 (21.9%), control 17 of 60 (28.3%).
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.