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. 2021 Sep 2;13(9):3089. doi: 10.3390/nu13093089

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(a) Dose–response relationship between dietary VD intake and the risk of low cognitive performance (Animal Fluency test); (b) Dose–response relationship between dietary VD intake and the risk of low cognitive performance (DSST); (c) Dose–response relationship between serum total 25(OH)D concentration and the risk of low cognitive performance (DSST); (d) Dose–response relationship between serum 25(OH)D₃ concentration and the risk of low cognitive performance (DSST). The solid line represents the OR values and dashed lines represent the 95% confidence intervals.