Vitamin D supplementation and COVID-19 risk: a population-based, cohort study

DOI record: { "DOI": "10.1007/s40618-021-01639-9", "ISSN": [ "1720-8386" ], "URL": "http://dx.doi.org/10.1007/s40618-021-01639-9", "alternative-id": [ "1639" ], "assertion": [ { "group": { "label": "Article History", "name": "ArticleHistory" }, "label": "Received", "name": "received", "order": 1, "value": "28 June 2021" }, { "group": { "label": "Article History", "name": "ArticleHistory" }, "label": "Accepted", "name": "accepted", "order": 2, "value": "12 July 2021" }, { "group": { "label": "Article History", "name": "ArticleHistory" }, "label": "First Online", "name": "first_online", "order": 3, "value": "17 July 2021" }, { "group": { "label": "Declarations", "name": "EthicsHeading" }, "name": "Ethics", "order": 1 }, { "group": { "label": "Conflicts of interest", "name": "EthicsHeading" }, "name": "Ethics", "order": 2, "value": "The authors declare no conflict of interest. The Catalan Agency for Health Quality and Evaluation (AQUAS), a governmental office, offered a data analyst for extracting all the data necessary for the development of this project. They had no role in the design of the study, analyses, interpretation of data; in the writing of the manuscript, or in the decision to publish these results." }, { "group": { "label": "Institutional review board statement", "name": "EthicsHeading" }, "name": "Ethics", "order": 3, "value": "This study was approved by the Institutional Ethics Committee of the Corporació Sanitària Parc Taulí—Universitat Autònoma Barcelona (Project number 2020588)." }, { "group": { "label": "Informed consent", "name": "EthicsHeading" }, "name": "Ethics", "order": 4, "value": "Not applicable." }, { "group": { "label": "Patient and public involvement", "name": "EthicsHeading" }, "name": "Ethics", "order": 5, "value": "It was not appropriate or possible to involve patients or the public in the design, or conduct, or reporting, or dissemination plans of our research." }, { "group": { "label": "Transparency statement", "name": "EthicsHeading" }, "name": "Ethics", "order": 6, "value": "The lead author (J. Oristrell) affirms that the manuscript is an honest, accurate, and transparent account of the study being reported. No important aspects of the study have been omitted, and there were no significant discrepancies from the study as it was planned." }, { "group": { "label": "Dissemination declaration", "name": "EthicsHeading" }, "name": "Ethics", "order": 7, "value": "Dissemination to the patients supplemented with vitamin D compounts is not applicable." }, { "label": "Free to read", "name": "free", "value": "This content has been made available to all." } ], "author": [ { "ORCID": "http://orcid.org/0000-0003-1486-3192", "affiliation": [], "authenticated-orcid": false, "family": "Oristrell", "given": "J.", "sequence": "first" }, { "ORCID": "http://orcid.org/0000-0003-1273-2746", "affiliation": [], "authenticated-orcid": false, "family": "Oliva", "given": "J. 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