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HCQ study #118 of 230
8/25 Early treatment study
Ip et al., BMC Infectious Diseases, doi:10.1186/s12879-021-05773-w (preprint 8/25) (Peer Reviewed)
Hydroxychloroquine in the treatment of outpatients with mildly symptomatic COVID-19: A multi-center observational study
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Retrospective 1,274 outpatients, 47% reduction in hospitalization with HCQ with propensity matching, HCQ OR 0.53 [0.29-0.95]. Sensitivity analyses revealed similar associations.
Adverse events were not increased (2% QTc prolongation events, 0% arrhythmias).

Ip et al., 8/25/2020, retrospective, database analysis, USA, North America, peer-reviewed, 25 authors, dosage not specified.
risk of death, 54.5% lower, RR 0.45, p = 0.43, treatment 2 of 97 (2.1%), control 44 of 970 (4.5%).
risk of ICU admission, 28.6% lower, RR 0.71, p = 0.79, treatment 3 of 97 (3.1%), control 42 of 970 (4.3%).
risk of hospitalization, 37.3% lower, RR 0.63, p = 0.04, treatment 21 of 97 (21.6%), control 305 of 970 (31.4%), adjusted per study, odds ratio converted to relative risk.
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