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0 0.5 1 1.5 2+ Severe case 71% Improvement Relative Risk Hospitalization 38% c19early.org/d Bagheri et al. Vitamin D for COVID-19 Prophylaxis Favors vitamin D Favors control
Supplement Usage Pattern in a Group of COVID- 19 Patients in Tehran
Bagheri et al., Journal of Family & Reproductive Health, doi:10.18502/jfrh.v14i3.4668
1 Sep 2021    Source   PDF   Share   Tweet
Retrospective 510 patients in Iran, showing lower risk of severity with vitamin D (statistically significant) and zinc (not statistically significant) supplementation. IR.TUMS.VCR.REC.1398.1063.
risk of severe case, 70.9% lower, OR 0.29, p = 0.02, treatment 131, control 379, adjusted per study, multinomial logistic regression, RR approximated with OR.
risk of hospitalization, 37.9% lower, RR 0.62, p = 0.11, treatment 28 of 131 (21.4%), control 143 of 379 (37.7%), NNT 6.1, adjusted per study, inverted to make RR<1 favor treatment, odds ratio converted to relative risk, binary logistic regression.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Bagheri et al., 1 Sep 2021, retrospective, Iran, peer-reviewed, 6 authors, dosage not specified.
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