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Updated: May 21, 2026

Generalized Psychophysiological Interaction (PPI) Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
Published on: November 14, 2017
Non-replication of an association of Apolipoprotein E2 with sinistrality
Brian J Piper1, Alia L Yasen, Amy E Taylor
1Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA. psy391@gmail.com
Abstract:
A recent report found that left-handed adolescents were more than three times more likely to have an Apolipoprotein (APOE) ϵ2 allele. This study was unable to replicate this association in young adults (N=166). A meta-analysis of nine other datasets (N=360 to 7559, Power > 0.999) including that of National Alzheimer's Coordinating Center also failed to find an over-representation of ϵ2 among left-handers indicating that this earlier outcome was most likely a statistical artefact.
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