Research Letter

Genetic Testing by Age at Onset in Parkinson Disease

JAMA Neurology 10.1001/jamaneurol.2026.1112

May 11, 2026 at 11:00 AM EDT

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This cohort study evaluates the association between age at onset and family history of Parkinson disease in patients who carry pathogenic variants.

Corresponding Authors: Inke R. König, Institut für Medizinische Biometrie und Statistik, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany (inke.koenig@uni-luebeck.de); Christine Klein, MD, Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany (christine.klein@uni-luebeck.de).

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