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Home   COVID-19 treatment studies for Vitamin D  COVID-19 treatment studies for Vitamin D  C19 studies: Vitamin D  Vitamin D   Select treatmentSelect treatmentTreatmentsTreatments
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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Mortality 41% Improvement Relative Risk c19vitamind.com/freitas.html Favors vitamin D Favors control
27 March 2021 - Analysis of outcomes based on serum levels
Vitamin D-related polymorphisms and vitamin D levels as risk biomarkers of COVID-19 infection severity
Freitas et al., medRxiv, doi:10.1101/2021.03.22.21254032 (Preprint)
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Analysis of 491 hospitalized patients in Portugal showing that polymorphisms in the vitamin D binding protein encoded by the GC gene are related to COVID-19 severity (p = 0.005). There was an association between vitamin D polygenic risk score and vitamin D levels (p = 0.042), and between vitamin D levels and mortality (p = 1.5e-4). Authors conclude that a genetic susceptibility for vitamin D deficiency may explain higher severity in COVID-19.
risk of death, 41.2% lower, RR 0.59, p = 0.02, high D levels 23 of 179 (12.8%), low D levels 68 of 311 (21.9%), NNT 11, >20ng/mL.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Freitas et al., 3/27/2021, retrospective, Portugal, Europe, preprint, 36 authors.
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