Retrospective 16,401 hospitalized patients in Spain showing a significant reduction in mortality associated with the prescription of vitamin D, especially calcifediol, within 15-30 days prior to hospitalization.
Loucera et al., 4/29/2021, retrospective, propensity score matching, Spain, Europe, preprint, 11 authors, dosage varies (calcifediol).
risk of death, 71.9% lower, RR 0.28, p < 0.001, treatment 193, control 193, calcifediol, <15 days before hospitalization, Cox model with inverse propensity weighting.
risk of death, 63.6% lower, RR 0.36, p < 0.001, treatment 210, control 210, calcifediol, <30 days before hospitalization, Cox model with inverse propensity weighting.
risk of death, 42.9% lower, RR 0.57, p < 0.001, treatment 358, control 358, cholecalciferol, <15 days before hospitalization, Cox model with inverse propensity weighting.
risk of death, 23.7% lower, RR 0.76, p < 0.03, treatment 416, control 416, cholecalciferol, <30 days before hospitalization, Cox model with inverse propensity weighting.
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 signficance,
however this provides the strongest evidence for the most serious outcomes
when combining the results of many trials.