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Vitamin D study #50 of 69
12/26 Late treatment study
Sistanizad et al., European Journal of Integrative Medicine, doi:10.1016/j.eujim.2020.101271 (Peer Reviewed)
High dose vitamin D improves total serum antioxidant capacity and ICU outcome in critically ill patients - a randomized, double-blind clinical trial
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RCT of 30 ventilated ICU patients showing lower mortality with vitamin D treatment, RR 0.36, p = 0.004. Authors do not indicate why the patients were hospitalized or if any of the patients were COVID-19 patients. 300,000 IU intramuscular vitamin D was used.

Sistanizad et al., 12/26/2020, Randomized Controlled Trial, Iran, Middle East, peer-reviewed, 8 authors, dosage 300,000IU single dose, intramuscular.
risk of death, 63.5% lower, RR 0.36, p = 0.004, treatment 5 of 16 (31.2%), control 12 of 14 (85.7%).

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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