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. 2023 Jan 9;15:10. doi: 10.1186/s13195-022-01121-5

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© The Author(s) 2023

Open AccessThis 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. 2 — Boxplot showing the mean adjusted volumes of right and left entorhinal (up) and right and left amygdala volumes (down) in non-APOE4 versus APOE4 carriers, stratified according to HRT use. Pairwise comparison within each genotype group was carried out on the estimated marginal mean (within the MANCOVA model), after adjustment for age, years of education, marital status, handedness, and CDR. Volumes were adjusted to the whole brain volume: Statistical results in the upper left corner of the four brain regions show P values of APOE genotype, HRT, and APOE*HRT for each region using the MANCOVA model. Non-APOE4 n= 641 (no-HRT n=591, HRT n= 50), APOE4 n= 375 (no-HRT n=346, HRT n= 29)