Retrospective 186 hospitalized patients in Belgium showing that 59% of patients were vitamin D deficient, and that non-vitamin D deficient patients had significantly lower mortality risk, RR 0.26,
p = 0.015.
De Smet et al., 11/25/2020, retrospective, Belgium, Europe, peer-reviewed, 5 authors.
risk of death, 70.1% lower, RR 0.30, p = 0.02, treatment 7 of 77 (9.1%), control 20 of 109 (18.3%), adjusted per study, odds ratio converted to relative risk, >20ng/mL.