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HCQ study #274 of 360   Meta Analysis
2/5 Pre-Exposure Prophylaxis study (treated before exposed to the virus)
Fitzgerald et al., medRxiv, doi:10.1101/2021.02.03.21251069 (Preprint)
Risk Factors for Infection and Health Impacts of the COVID-19 Pandemic in People with Autoimmune Diseases
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Retrospective 4666 people with autoimmune or inflammatory conditions, showing HCQ adjusted risk of COVID-19 OR 0.91 [0.68-1.23]. Results are not adjusted for the significantly different risk of COVID-19 depending on the type and severity of autoimmune or inflammatory condition.
Fitzgerald et al., 2/5/2021, retrospective, USA, North America, preprint, 34 authors.
risk of COVID-19 case, 8.5% lower, RR 0.91, p = 0.52, treatment 65 of 1,072 (6.1%), control 200 of 3,594 (5.6%), adjusted per study, odds ratio converted to relative risk.
This study is excluded in the after exclusion results of meta analysis: not fully adjusting for the baseline risk differences within systemic autoimmune patients.
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 360 studies   Meta Analysis
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