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HCQ study #159 of 260
10/15 Late treatment study
Guisado-Vasco (Peer Reviewed)
Clinical characteristics and outcomes among hospitalized adults with severe COVID-19 admitted to a tertiary medical center and receiving antiviral, antimalarials, glucocorticoids, or immunomodulation with tocilizumab or cyclosporine: A retrospective observational study (COQUIMA cohort)
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Retrospective 607 patients reporting results for early outpatient HCQ use with mortality odds ratio OR 0.092 [0.022-0.381], p = 0.001 (65 patients), and for hospital use, mortality odds ratio OR 0.737 [0.38-1.41], p = 0.36 (558 patients). Median age 69.

Guisado-Vasco et al., 10/15/2020, retrospective, Spain, Europe, peer-reviewed, median age 69.0, 25 authors.
risk of death, 20.3% lower, RR 0.80, p = 0.36, treatment 127 of 558 (22.8%), control 14 of 49 (28.6%), adjusted per study, odds ratio converted to relative risk.
outpatient use, 88.0% lower, RR 0.12, p = 0.001, treatment 2 of 65 (3.1%), control 139 of 542 (25.6%), adjusted per study, odds ratio converted to relative risk.

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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