RT Journal Article T1 Real world evidence of calcifediol or vitamin D prescription and mortality rate of COVID-19 in a retrospective cohort of hospitalized Andalusian patients A1 Loucera, Carlos A1 Peña-Chilet, María A1 Esteban-Medina, Marina A1 Muñoyerro-Muñiz, Dolores A1 Villegas, Román A1 Lopez-Miranda, Jose A1 Rodriguez-Baño, Jesus A1 Túnez, Isaac A1 Bouillon, Roger A1 Dopazo, Joaquin A1 Quesada Gomez, Jose Manuel K1 Vitamin D K1 Calcifediol K1 Mortality K1 Hospitalization K1 Population health K1 COVID-19 K1 Vitamina D K1 Mortalidad K1 Hospitalización K1 Salud poblacional K1 Andalucía AB COVID-19 is a major worldwide health problem because of acute respiratory distress syndrome, and mortality. Several lines of evidence have suggested a relationship between the vitamin D endocrine system and severity of COVID-19. We present a survival study on a retrospective cohort of 15,968 patients, comprising all COVID-19 patients hospitalized in Andalusia between January and November 2020. Based on a central registry of electronic health records (the Andalusian Population Health Database, BPS), prescription of vitamin D or its metabolites within 15-30 days before hospitalization were recorded. The effect of prescription of vitamin D (metabolites) for other indication previous to the hospitalization was studied with respect to patient survival. Kaplan-Meier survival curves and hazard ratios support an association between prescription of these metabolites and patient survival. Such association was stronger for calcifediol (Hazard Ratio, HR = 0.67, with 95% confidence interval, CI, of [0.50-0.91]) than for cholecalciferol (HR = 0.75, with 95% CI of [0.61-0.91]), when prescribed 15 days prior hospitalization. Although the relation is maintained, there is a general decrease of this effect when a longer period of 30 days prior hospitalization is considered (calcifediol HR = 0.73, with 95% CI [0.57-0.95] and cholecalciferol HR = 0.88, with 95% CI [0.75, 1.03]), suggesting that association was stronger when the prescription was closer to the hospitalization. PB Springer Nature YR 2021 FD 2021-12-03 LK http://hdl.handle.net/10668/3808 UL http://hdl.handle.net/10668/3808 LA en NO Loucera C, Peña-Chilet M, Esteban-Medina M, Muñoyerro-Muñiz D, Villegas R, Lopez-Miranda J, et al. Real world evidence of calcifediol or vitamin D prescription and mortality rate of COVID-19 in a retrospective cohort of hospitalized Andalusian patients. Sci Rep. 2021 Dec 3;11(1):23380 DS RISalud RD Apr 17, 2025