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0 0.5 1 1.5 2+ Case 30% Improvement Relative Risk c19vitamind.com Ma et al. Vitamin D for COVID-19 Prophylaxis Favors vitamin D Favors control
Ma, 8,297 patient vitamin D prophylaxis study: 30% fewer cases [p=0.03] https://c19p.org/ma
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Habitual use of vitamin D supplements and risk of coronavirus disease 2019 (COVID-19) infection: a prospective study in UK Biobank
Ma et al., The American Journal of Clinical Nutrition, doi:10.1093/ajcn/nqaa381
29 Jan 2021    Source   PDF   Share   Tweet
Retrospective 8,297 adults from the UK Biobank showing the habitual use of vitamin D supplements significantly associated with lower risk of COVID-19 cases. Note that the information on vitamin D supplement use was collected a median of 10 years before the COVID-19 tests, so usage may have changed significantly.
risk of case, 30.0% lower, RR 0.70, p = 0.03, treatment 49 of 363 (13.5%), control 1,329 of 7,934 (16.8%), adjusted per study, odds ratio converted to relative risk.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Ma et al., 29 Jan 2021, retrospective, United Kingdom, peer-reviewed, 4 authors, dosage not specified.
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