Retrospective 603 patients in Iran, 192 taking vitamin D supplements, showing no significant difference in COVID-19 cases in unadjusted results. IR.SHOUSHTAR.REC.1399.015.
risk of case, 12.4% lower, RR 0.88, p = 0.09, treatment 99 of 192 (51.6%), control 242 of 411 (58.9%), NNT 14.
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Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
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This study is excluded in the after exclusion results of meta
analysis:
unadjusted results with no group details.
Mohseni et al., 8/4/2021, retrospective, Iran, Middle East, peer-reviewed, 4 authors, dosage not specified.