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Zhao JL, Cross N, Yao CW, Carrier J, Postuma RB, Gosselin N, Kakinami L, Dang-Vu TT. Insomnia disorder increases the risk of subjective memory decline in middle-aged and older adults: a longitudinal analysis of the Canadian Longitudinal Study on Aging. Sleep 2022; 45:zsac176. [PMID: 35877203 PMCID: PMC9644124 DOI: 10.1093/sleep/zsac176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/13/2022] [Indexed: 07/27/2023] Open
Abstract
STUDY OBJECTIVES To examine the longitudinal association between probable insomnia status and both subjective and objective memory decline in middle-aged and older adults. METHODS 26 363 participants, ≥45 years, completed baseline and follow-up (3 years after baseline) self-reported evaluations of sleep and memory, and neuropsychological testing in the following cognitive domains: memory, executive functions, and psychomotor speed. Participants were categorized as having probable insomnia disorder (PID), insomnia symptoms only (ISO), or no insomnia symptoms (NIS), based on sleep questionnaires. Participants were further grouped based on their sleep change over time. Prospective odds of self-reported memory worsening were assessed using logistic regression, and associations between insomnia and cognitive performance were assessed via linear mixed-effects modeling, adjusted for demographic, lifestyle, and medical factors. RESULTS An increased odds (OR 1.70; 95% CI 1.29-2.26) of self-reported memory worsening was observed for NIS participants at baseline who developed PID at follow-up compared to those who developed ISO or remained NIS. Additionally, participants whose sleep worsened from baseline to follow-up (i.e. transitioned from NIS to ISO, ISO to PID, or NIS to PID) displayed increased odds (OR 1.22; 95% CI 1.10-1.34) of subjective memory worsening at follow-up compared to those who remained insomnia-free or improved their sleep. There were no significant associations between the development of PID or worsening sleep and performance on neuropsychological tests. CONCLUSIONS These findings of an increased odds for subjective memory decline in middle-aged and older adults with insomnia disorder suggest insomnia may be an important target for early interventions addressing age-related cognitive decline.
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Affiliation(s)
| | - Nathan Cross
- Corresponding author. Nathan Cross and Thien Thanh Dang-Vu, Center for Studies in Behavioral Neurobiology and PERFORM Center, Concordia University, 7141 Sherbrooke St. West, SP 165.30, Montreal, QC, Canada. ;
| | - Chun W Yao
- Canadian Sleep and Circadian Network, Montreal, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Canada
- Research Institute of McGill University Health Center, Montreal, Canada
| | - Julie Carrier
- Institut Universitaire de Gériatrie de Montréal and CRIUGM, CIUSSS du Centre-Sud-de-l’Ile-de-Montréal, Montreal, Canada
- Canadian Sleep and Circadian Network, Montreal, Canada
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montreal, CIUSSS du Nord-de-l’Ile-de-Montréal, Montreal, Canada
- Department of Psychology, Université de Montréal, Montreal, Canada
| | - Ronald B Postuma
- Canadian Sleep and Circadian Network, Montreal, Canada
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montreal, CIUSSS du Nord-de-l’Ile-de-Montréal, Montreal, Canada
- Department of Neurology and Neurosurgery, McGill University—Montreal General Hospital, Montreal, Canada
| | - Nadia Gosselin
- Canadian Sleep and Circadian Network, Montreal, Canada
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montreal, CIUSSS du Nord-de-l’Ile-de-Montréal, Montreal, Canada
- Department of Psychology, Université de Montréal, Montreal, Canada
| | - Lisa Kakinami
- PERFORM Centre, Concordia University, Montreal, Canada
- Department of Mathematics and Statistics, Concordia University, Montreal, Canada
| | - Thien Thanh Dang-Vu
- Corresponding author. Nathan Cross and Thien Thanh Dang-Vu, Center for Studies in Behavioral Neurobiology and PERFORM Center, Concordia University, 7141 Sherbrooke St. West, SP 165.30, Montreal, QC, Canada. ;
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