Retrospective 92 ICU patients with almost all treated with HCQ and only one non-HCQ treated patient that died, showing unadjusted non-statistically significant lower mortality with treatment.
Martin-Vicente et al., 3/8/2021, retrospective, Spain, Europe, preprint, 38 authors.
risk of death, 59.3% lower, RR 0.41, p = 0.41, treatment 37 of 91 (40.7%), control 1 of 1 (100.0%).
This study is excluded in the after exclusion results of meta analysis: unadjusted results with no group details, treatment or control group size extremely small.
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.