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. 2024 Aug 1;147(8):2652–2667. doi: 10.1093/brain/awae188

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© The Author(s) 2024. Published by Oxford University Press on behalf of the Guarantors of Brain.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Comparison of demographic and age-related variables between idiopathic Parkinson’s disease patients and four different genetic patient subgroups [positive Parkinson’s disease-relevant genetic test (PDGT) based on GBA1, LRRK2, PRKN/PINK1 or SNCA variants]. (A) Sex (top section in blue = male; bottom section red = female). (B) Fractions of patients with positive family history (bottom section in red = positive family history; top section in blue = negative family history). (C) Age at onset. (D) Age at diagnosis. (E) Age at enrolment. IPD = idiopathic Parkinson’s disease.