Prospective study of 57 consecutive hospitalized COVID-19 patients in Switzerland, showing higher risk of mortality/ICU admission with vitamin A, vitamin D, and zinc deficiency, with statistical significance only for vitamin A and zinc. Adjustments only considered age.
risk of death/ICU, 77.1% lower, RR 0.23, p = 0.007, high zinc levels 5 of 35 (14.3%), low zinc levels 10 of 22 (45.5%), NNT 3.2, adjusted per study, inverted to make RR<1 favor high zinc levels, odds ratio converted to relative risk.
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Voelkle et al., 30 Apr 2022, prospective, Switzerland, peer-reviewed, median age 67.0, 9 authors, study period 17 March, 2020 - 30 April, 2020.
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