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All Studies   Meta Analysis   Recent: 
0 0.5 1 1.5 2+ Mortality 42% Improvement Relative Risk Mortality (b) 51% Severe case 38% Severe case (b) 35% c19vitamind.com Fatemi et al. Vitamin D for COVID-19 Sufficiency Favors vitamin D Favors control
Fatemi, 248 patient vitamin D sufficiency study: 42% lower mortality [p=0.07] and 38% lower severe cases [p=0.007] https://c19p.org/fatemi
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Association of vitamin D deficiency with COVID-19 severity and mortality in Iranian people: a prospective observational study
Fatemi et al., Acute and Critical Care, doi:10.4266/acc.2021.00605
30 Nov 2021    Source   PDF   Share   Tweet
Prospective study of 248 hospitalized COVID+ patients in Iran with vitamin D levels measured in the previous year and again at admission, showing vitamin D status associated with severity and mortality.
risk of death, 42.0% lower, RR 0.58, p = 0.07, high D levels 18 of 139 (12.9%), low D levels 25 of 109 (22.9%), NNT 10, inverted to make RR<1 favor high D levels, odds ratio converted to relative risk, vitamin D measured prior to COVID-19, multivariate.
risk of death, 51.1% lower, RR 0.49, p = 0.02, high D levels 13 of 115 (11.3%), low D levels 30 of 133 (22.6%), NNT 8.9, inverted to make RR<1 favor high D levels, odds ratio converted to relative risk, vitamin D measured on admission, multivariate.
risk of severe case, 37.9% lower, RR 0.62, p = 0.007, high D levels 38 of 139 (27.3%), low D levels 48 of 109 (44.0%), NNT 6.0, vitamin D measured prior to COVID-19.
risk of severe case, 34.8% lower, RR 0.65, p = 0.02, high D levels 31 of 115 (27.0%), low D levels 55 of 133 (41.4%), NNT 6.9, vitamin D measured on admission.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Fatemi et al., 30 Nov 2021, prospective, Iran, peer-reviewed, 5 authors, study period 1 October, 2020 - 31 May, 2021.
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