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Disturbing dreams and dementia incidence across diverse cohort studies: A COSMIC collaboration study

Darren M. Lipnicki, Ashleigh S. Vella, É. Castro-Costa, S. L. Blay, M. F. Lima-Costa, Karen Ritchie, E. Rolandi, Annalisa Davin, M. Rossi, Ki Woong Kim, Ji Won Han, Dae Jong Oh, D. Ding, Qian-hua Zhao, Xiaowen Zhou, Yen-Ching Chen, Jen-Hau Chen, Perminder S. Sachdev

Psychiatry and Clinical Neurosciences March 17, 2026 DOI: 10.1111/pcn.70046 (opens in new tab)

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Abstract

Distressing dreams were previously reported to predict future all‐cause dementia among predominantly white US participants aged 79–89 years, particularly in men. We investigated whether disturbing dreams (nightmares and bad dreams) were associated with all‐cause and Alzheimer dementia (AD) among individuals aged 60–89 years from diverse international regions.

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