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. 2024 Mar 7;24:238. doi: 10.1186/s12877-024-04841-5

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Flow-chart of the DanACo cohort. Abbreviations: LiKO-15: Lifestyle and Cognition Follow-up study 2015; DiaKO-19: Diabetes and Cognition Follow-up study 2019; DanACo: Danish Aging and Cognition. The included percentages were calculated as proportions of the number of men invited to the LiKO-15 and DiaKO-19 studies, respectively. For LiKO-15, the percentages marked with * are calculated based on the total number of participants invited from the Psychiatric database and the Danish Conscription Database. ^†As 3,805 of the LiKO-15 non-participants were also invited to the DiaKO-19 study, the total number of non-participants in the DanACo cohort, 37,444 men, is equal to the combined number of non-participants from the LiKO-15 and DiaKO-19 studies (35,909) minus the 3,805 participants that were invited twice