Researchers found that older men in the lowest quartile of circadian rhythm strength, activity and robustness levels were nearly three times as likely to develop Parkinson's disease as those in the highest quartile. The findings in JAMA Neurology also showed the association held true after accounting for nighttime sleep disturbances and duration, but that acrophase, or peak activity timing, didn't have a significant link with Parkinson's risk.
Circadian rhythm disruption ups Parkinson's odds in older men
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