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Vitamin D study #174   Meta Analysis
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Mortality -12% Imp. Relative Risk, 95% CI Mechanical ventilation 43% ICU admission 44% Hospitalization time 12% Arroyo-Díaz: Previous Vitamin D Supplementation and Morbidity and Mor.. c19vitamind.com/arroyodiaz.html Favors vitamin D Favors control
9/24 Prophylaxis study
Arroyo-Díaz et al., Frontiers in Public Health, doi:10.3389/fpubh.2021.758347 (Peer Reviewed)
Previous Vitamin D Supplementation and Morbidity and Mortality Outcomes in People Hospitalised for COVID19: A Cross-Sectional Study
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Retrospective 1,267 hospitalized patients in Spain, 189 on vitamin D supplementation before admission, showing lower ICU admission with supplementation, and no statistically significant difference for mortality or ventilation.
risk of death, 12.4% higher, RR 1.12, p = 0.59, treatment 50 of 189 (26.5%), control 167 of 1,078 (15.5%), adjusted per study, odds ratio converted to relative risk.
risk of mechanical ventilation, 43.3% lower, RR 0.57, p = 0.22, treatment 11 of 189 (5.8%), control 113 of 1,078 (10.5%), adjusted per study, odds ratio converted to relative risk.
risk of ICU admission, 44.2% lower, RR 0.56, p = 0.03, treatment 13 of 189 (6.9%), control 133 of 1,078 (12.3%), unadjusted.
hospitalization time, 11.8% lower, relative time 0.88, p = 0.20, treatment 189, control 1,078, unadjusted.
Arroyo-Díaz et al., 9/24/2021, retrospective, Spain, Europe, peer-reviewed, 11 authors, dosage not specified.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical significance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
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