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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 78% Improvement Relative Risk Mortality (b) 85% Severe case 67% Severe case (b) 53% c19vitamind.com/karonova2.html Favors vitamin D Favors control
29 August 2021 - Analysis of outcomes based on serum levels
Low 25(OH)D Level Is Associated with Severe Course and Poor Prognosis in COVID-19
Karonova et al., Nutrients, doi:10.3390/nu13093021 (Peer Reviewed)
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Retrospective 161 hospitalized patients in Russia, showing COVID-19 severity and mortality associated with vitamin D deficiency. Patients in this study may overlap with those in an earlier smaller study from some of the same authors.
risk of death, 77.8% lower, RR 0.22, p = 0.006, high D levels 8 of 96 (8.3%), low D levels 10 of 37 (27.0%), NNT 5.3, adjusted per study, odds ratio converted to relative risk, >10ng/mL, logistic regression model 2.
risk of death, 84.8% lower, RR 0.15, p = 0.06, high D levels 1 of 43 (2.3%), low D levels 17 of 90 (18.9%), NNT 6.0, adjusted per study, odds ratio converted to relative risk, >20ng/mL, logistic regression model 2.
risk of severe case, 67.3% lower, RR 0.33, p = 0.005, high D levels 12 of 96 (12.5%), low D levels 13 of 37 (35.1%), NNT 4.4, adjusted per study, odds ratio converted to relative risk, >10ng/mL, logistic regression model 2.
risk of severe case, 53.2% lower, RR 0.47, p = 0.13, high D levels 4 of 43 (9.3%), low D levels 21 of 90 (23.3%), NNT 7.1, adjusted per study, odds ratio converted to relative risk, >20ng/mL, logistic regression model 2.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Karonova et al., 8/29/2021, retrospective, Russia, Europe, peer-reviewed, 8 authors.
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