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Circadian Rhythm Disruption Is a Risk Factor for Brain Disorders
- Circadian rhythm disruption is a risk factor for developing common neurodegenerative and psychiatric disorders, including all-cause dementia, Parkinson’s disease, stroke, major depression disorder, and anxiety disorder.
Why This Matters
- Future studies should focus on circadian rhythm as a potential target for preventing various brain disorders.
- Findings are from a prospective cohort study that included 72,242 participants (age 37-73 years) from the UK Biobank (2006-2010).
- Main outcomes: first occurrence of common brain disorders including dementia, Alzheimer’s disease, Parkinson’s disease, stroke, major depression disorder, and anxiety disorder.
- Funding: Science and Technology Innovation 2030 Major Projects and others.
- During a median follow-up of 6.1 years, 262 participants were diagnosed with all-cause dementia, 115 with Alzheimer’s disease, 190 with Parkinson’s disease, 481 with stroke, 1102 with major depression disorder, and 1161 with anxiety disorders.
- Individuals with a lower relative amplitude had a higher risk of (adjusted HR [aHR]; 95% CI):
- all-cause dementia (1.23; 1.15 to 1.31; P<0.001);
- Parkinson’s disease (1.33; 1.25 to 1.41; P<0.001);
- stroke (1.13; 1.06 to 1.22; P<0.001);
- major depression disorder (1.18; 1.13 to 1.23; P<0.001); and
- anxiety disorder (1.14; 1.09 to 1.20; P<0.001).
- There was a significant association between the low relative amplitude and the Alzheimer’s disease risk (aHR 1.16; 95% CI 1.01 to 1.33; P=0.036), but this association was not significant after Bonferroni correction (α = 0.05/6).
- Observational design.
- Risk of unmeasured or residual confounding.