key: cord-0829112-evc0uvqf
authors: Bakaloudi, Dimitra Rafailia; Chourdakis, Michail
title: Letter to the editor: “Revisiting the role of vitamin D levels in the prevention of COVID-19 infection and mortality in European countries post infections peak”
date: 2021-09-16
journal: Aging Clin Exp Res
DOI: 10.1007/s40520-021-01975-z
sha: 16029049401b5e4721d28fc0124ca18dcb764476
doc_id: 829112
cord_uid: evc0uvqf

nan

European countries were obtained by Lips et al. 2019 [4] . Nevertheless, some of the data used included both children and adult population (i.e., data for UK), were not means but medians (i.e., data from Switzerland), included specific population subgroups (i.e., Slovakia: only women) or were rather old (i.e., Switzerland: data from 1992, Turkey: data from 2007) and therefore could not be used as representative for the year 2020 (See Supplementary Material). Moreover, some data seemed not to be obtained for Lips et al. study and the source of this information is missing (i.e., data from Italy, Spain, Hungary, Estonia and Sweden).

Recently, we have conducted the same analysis using updated data regarding both the COVID-19 and the mean Vitamin D concentration of each European country and significant correlation was not found for infections (r = − 0.245; p = 0.378) or mortality rates (r = − 0.362; p = 0.185) (See Supplementary Material) .

We believe that a more accurate analysis would have been succeeded if the authors had used the prevalence of vitamin D deficiency for each country instead of the mean values.

Yours sincerely.

The online version contains supplementary material available at https:// doi. org/ 10. 1007/ s40520-021-01975-z.

Conflict of interest On behalf of all authors, the corresponding author states that there is no conflict of interest.

Informed consent Not applicable.

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