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All Studies   Meta Analysis   Recent: 
0 0.5 1 1.5 2+ Severe or critical case 85% Improvement Relative Risk c19vitamind.com Dror et al. Vitamin D for COVID-19 Sufficiency Favors vitamin D Favors control
Dror, 253 patient vitamin D sufficiency study: 85% lower severe cases [p=0.001] https://c19p.org/dror
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Pre-infection 25-hydroxyvitamin D3 levels and association with severity of COVID-19 illness
Dror et al., PLOS ONE, doi:10.1371/journal.pone.0263069 (date from earlier preprint)
7 Jun 2021    Source   PDF   Share   Tweet
Retrospective 253 hospitalized patients in Israel showing higher mortality and higher risk of severe cases with vitamin D deficiency. Vitamin D levels were measured 14 to 730 days before the COVID-19 test. Adjusted results are only provided for severity.
risk of severe or critical case, 84.8% lower, RR 0.15, p = 0.001, high D levels 109 of 120 (90.8%), low D levels 76 of 133 (57.1%), adjusted per study, inverted to make RR<1 favor high D levels, odds ratio converted to relative risk, >40ng/mL vs. <20ng/mL, multivariable.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Dror et al., 7 Jun 2021, retrospective, Israel, peer-reviewed, 18 authors.
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