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22.01.2015

Sleep too much stroke, sound options tinnitus treatments - PDF Review

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SLEEPING more than eight hours a night could dramatically increase the risk of suffering a stroke, scientists warned yesterday.
The negative implications of sleep deprivation are well documented; it can cause problems with memory and concentration and has been associated with increased risk of obesity, diabetes and heart disease.
According to the National Sleep Foundation, adults aged 18-64 should get 7-9 hours of sleep each night. But this latest study, involving more than 9,000 people with an average age of 62, found that getting more than 8 hours sleep each night was associated with a 46% increased risk of stroke. Stroke occurs when the blood supply to the brain is restricted, either through a blood clot or a burst blood vessel.
Based on their findings, Leng and colleagues say it is unclear as to whether sleeping more than 8 hours a night - referred to as "long sleep" - is a cause or result of stroke. To reach their findings, the team recruited 9,692 people with an average age of 62 who had never experienced a stroke.
Over an average follow-up period of 9.5 years, the participants completed two questionnaires 4 years apart that gathered information on how many hours they slept each night. Compared with participants who slept for 6-8 hours each night - considered an "average" amount of sleep - the team found those who slept for more than 8 hours were 46% more likely to have a stroke. What is more, the researchers found that people who increased their amount of sleep from 6-8 hours each night to more than 8 hours during follow-up were four times more likely to have a stroke, compared with those who consistently slept for 6-8 hours a night. An additional analysis of previous research that assesses the link between sleep duration and stroke, conducted by Leng and colleagues, also found that sleeping more than 8 hours a night was associated with increased stroke risk.
Earlier this month, Medical News Today reported on a study by researchers at Columbia University's Mailman School of Public Health, which found that the average number of hours slept per night among teenagers in the US has declined over the past 2 decades. Getting too little sleep each night has been linked to an increased risk for stroke, but sleeping too much may also raise stroke risk.Note that it is not known whether long sleep is a cause, consequence, or early marker of ill health that can lead to an increased risk for stroke, and that more research is needed to understand the relationship between long sleep and stroke.


Getting too little sleep each night has been linked to an increased risk for stroke, but sleeping too much may also raise stroke risk, according to results from two studies. Long sleepers who averaged more than 8 hours of sleep each night were 46% more likely to have strokes than those who consistently slept 6 to 8 hours, researchers reported online in Neurology.
And those who transitioned from averaging less than 6 hours of nightly shut-eye to more than 8 hours had the highest risk, with close to a fourfold increase in stroke risk compared with people who consistently averaged 6 to 8 hours of sleep each night. A widely reported 2012 study found that less than 6 hours a night of sleep was associated with a more than fourfold increase in stroke risk.
Leng's group conducted their own study of sleep duration and stroke risk in a British population, and they also updated the 2009 meta-analysis. At baseline, 69% of participants reported sleeping 6 to 8 hours per night, while 10% reported sleeping for more than 8 hours and 21% reported sleeping less than 6 hours. Those reporting less than 6 hours and more than 8 hours of sleep were more likely to be older and female, to be less active, and to have major depression.
During the follow-up there were 346 fatal or nonfatal strokes among the study participants. The study had some limitations, notably that the stroke-free participants were "younger and had higher social class and educational level compared to the baseline population," the authors explained.
Sleeping more than eight hours a night has been linked to a higher risk of stroke, a new study finds. Older people are particularly affected by too much sleep, with those sleeping longer than average doubling their risk of a stroke. The ten-year-long study followed the sleeping habits of almost 10,000 British people between the ages of 42 and 81.
While 70% reported sleeping between six and eight hours a night, 10% slept more than eight hours.


The researchers found that people who had too much sleep (more than eight hours) had a 46% greater risk of suffering a stroke. Although older people often have the option to sleep longer, in general average sleep duration typically gets shorter with age. Lack of sleep has clear links to stroke risk because of the increased production of the stress hormone cortisol. But a new study suggests getting too much sleep may also be bad for us: it could significantly increase the risk of stroke.
More than 795,000 people in the US experience stroke each year and it is the leading cause of disability in the country. She told us that the increased sleep duration among participants might have indicated excessive sleepiness and fatigue as a result of declining health. More research is needed to understand the relationship between long sleep and stroke," said PhD candidate Yue Leng, of the University of Cambridge in England, in a written statement. An earlier meta-analysis of sleep and stroke studies suggested a U-shaped relationship, with both short and long sleep associated with an increased risk for stroke. Also, sleep duration was reported with a single question and that may reflect perception of sleep rather than biological sleep.



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