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Vitamin D study #15 of 109
8/11 Analysis of outcomes based on serum levels
Im et al., Int. J. Infect. Dis., doi:10.1016/j.ijid.2020.08.018 (Peer Reviewed)
Nutritional status of patients with COVID-19
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Nutrient study of 50 hospitalized COVID-19 patients in South Korea showing that 76% of patients were vitamin D deficient. Comparison with 150 matched controls showed a higher probability of cases with vitamin D deficiency.

Im et al., 8/11/2020, retrospective, South Korea, Asia, peer-reviewed, 6 authors.
risk of COVID-19 case, 73.1% lower, RR 0.27, p = 0.003, high D levels 98, low D levels 102.

Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
All 109 studies
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