Daylight Savings Linked to Increased Risk of Stroke

Finnish researchers have found that changing the clock forward or back leads raises an individual’s stroke risk. The team analyzed data from 3,033 men and women hospitalized during the week after a daylight saving time transition and found that the overall rate of ischemic stroke was 8% higher during the first two days after the time change than in subsequent days. Author Dr. Jori Ruuskanen explains, “We know from previous studies that stroke risk is highest in the morning hours and daylight saving time slightly shifts the timing pattern of stroke onset. Previous studies have also shown that the disruption of the circadian clock due to other reasons (e.g. due to rotating shift work) and sleep fragmentation are associated with an increased risk of stroke.” Further research is needed to confirm the findings, but the team believes the results are convincing.
American Academy of Neurology’s 68th Annual Meeting, April 2016