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Home   COVID-19 treatment studies for Vitamin D  COVID-19 treatment studies for Vitamin D  C19 studies: Vitamin D  Vitamin D   Select treatmentSelect treatmentTreatmentsTreatments
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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Hospitalization 9% Improvement Relative Risk c19vitamind.com/israel2.html Favors vitamin D Favors control
27 July 2021 - Prophylaxis study
Identification of drugs associated with reduced severity of COVID-19: A case-control study in a large population
Israel et al., Epidemiology and Global Health Microbiology and Infectious Disease, doi:10.7554/eLife.68165 (Peer Reviewed)
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Case control study examining medication usage with a healthcare database in Israel, showing lower risk of hospitalization with vitamin D (defined as being picked up within 35 days prior to PCR+). Other patients may have acquired vitamin D supplements outside of the healthcare system.
risk of hospitalization, 9.1% lower, RR 0.91, p = 0.003, treatment 737 of 2,406 (30.6%), control 6,216 of 18,453 (33.7%), NNT 33, odds ratio converted to relative risk, PCR+, cohort 2.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Israel et al., 7/27/2021, retrospective, Israel, Middle East, peer-reviewed, 10 authors, dosage not specified.
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