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Domain-Specific Cognitive Concordance in Older Married Couples

JAMA Network Open 10.1001/jamanetworkopen.2026.31017

August 26, 2026 at 11:00 AM EDT

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In this cross-sectional study of 783 older married couples, spousal cognitive concordance was domain specific, with the greatest effect size estimates in language and visuospatial function rather than global cognition. These findings suggest that spousal cognitive similarity may be missed when analyses rely only on global screening measures, highlighting the need for longitudinal study of within-couple concordance.

Corresponding Author: Ki Woong Kim, MD, PhD, Department of Neuropsychiatry, Seoul National University Bundang Hospital, 82 Gumiro, 173 Beongil Bundang-gu, Seongnam-si, Gyeonggi-do 13620, Korea (kwkimmd@snu.ac.kr).

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