Changing the time to summer time increases the risk of ischemic strokes
Changing the time to daylight saving time or winter time could increase our risk of stroke. Finnish researchers found that changing the clock twice a year is associated with a higher rate of ischemic strokes.
Ischemic strokes make up about 85 percent of all strokes. In their current study, the doctors discovered that the likelihood of such a stroke increases if we change our clocks twice a year. The scientists from the University of Turku have their results at the annual meeting of the American Academy of Neurology. presented.
Rate of ischemic strokes increases due to time changes
If we sleep too little, the risk of some illnesses increases. Our risk of stroke increases if we sleep too little or too much, doctors say. Changing the time twice is a health burden and, according to the researchers, is associated with a higher rate of ischemic strokes and other problems. Our internal clock is affected by the change of time and for this reason we sleep less well, explains the main author Dr. Jari Ruuskanen from the University of Turku. Ischemic strokes are responsible for around 85 percent of all strokes and occur when a blood clot blocks our brain's oxygenation, the experts report.
The scientists used the data from ten years of research to determine the rate of stroke in Finland. Around 3,000 subjects were examined the week after the switch to daylight saving time, and the researchers compared the rates for strokes with the data from almost 12,000 patients who were admitted to a hospital two weeks before the time change.
Risk particularly high in the first two days after the time change
Results in the first two days after the transition to daylight saving time showed that the rate of ischemic strokes increased by eight percent. After another two days, these rates reduced back to normal values, the doctors explain. According to the scientists, people with cancer have a 25 percent higher risk of suffering a stroke after the time change. Just like people older than 65 years. These increase the risk by 20 percent of suffering a stroke in the two-day transition period. Further studies need to be done to fully understand the relationship between these time changes and the risk of stroke and to find out if there are ways to reduce the risk, adds Dr. Ruuskanen added. (as)