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HCQ study #263 of 320   Meta Analysis
2/18 Late treatment study
Awad et al., American Journal of Health-System Pharmacy, doi:10.1093/ajhp/zxab056 (Peer Reviewed)
Impact of hydroxychloroquine on disease progression and ICU admissions in patients with SARS-CoV-2 infection
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This paper has inconsistent values - the number of treatment and control patients differs in the text and Table 1, we have used treatment 188 and control 148. Retrospective 336 hospitalized patients in the USA showing higher mortality, ICU admission, and intubation with treatment. Confounding by indication is likely. Time varying confounding is also likely due to declining usage over the early period when overall treatment protocols were also improving dramatically. Authors and reviewers appear to be unfamiliar with either of these.

Awad et al., 2/18/2021, retrospective, USA, North America, peer-reviewed, 4 authors.
risk of death, 19.1% higher, RR 1.19, p = 0.60, treatment 56 of 188 (29.8%), control 37 of 148 (25.0%).
risk of mechanical ventilation, 460.7% higher, RR 5.61, p < 0.001, treatment 64 of 188 (34.0%), control 9 of 148 (6.1%), adjusted per study, odds ratio converted to relative risk.
risk of ICU admission, 463.4% higher, RR 5.63, p < 0.001, treatment 67 of 188 (35.6%), control 9 of 148 (6.1%), 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.
All 320 studies   Meta Analysis
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