Treatable Sleep Disorder Common In People With Thinking And
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Obstructive sleep apnea is when breathing is repeatedly interrupted during sleep. Research has shown people with this sleep disorder have an increased risk of developing cognitive impairment and Alzheimer's disease. The study will be presented at the American Academy of Neurology's 73rd Annual Meeting.

Cognitive impairment includes memory and thinking problems that affect concentration, decision making and learning new things. Those with sleep apnea had lower scores on thinking and memory tests, study found. "With treatment, there is potential to improve thinking andmemory skills," study author says. The risk of cognitive impairment increases as people age.

The study involved 67 people with an average age of 73 who had cognitive impairment. Participants completed questionnaires on sleep, cognition and mood. They also took a 30-point cognitive assessment to determine their level of cognitive impairment. Questions included identifying the date and the city they were in and repeating words they had been asked to remember earlier in the test.

Scores on the test range from zero to 30. A score of 26 or higher is considered normal, 18-25 signifies mild cognitive impairment and 17 or lower signifies moderate to severe cognitive impairment. Participants were given at-home sleep apnea tests to determine if they had obstructive sleep apnea. The athome test uses a monitor to track breathing patterns and oxygen levels during sleep.

Researchers found that 52% of study participants had obstructive sleep apnea. People with the sleep disorder were 60% more likely to score lower on the cognitive test than people who did not have sleep apnea. People with the disorder had an average score of 20.5 compared to an average score of 23.6 for the people without the sleep disorder.

In addition, researchers found that the severity of obstructive sleep apnea corresponded with the degree of cognitive impairment as well as the quality of sleep for participants, including sleep time, how quickly they fell asleep, the efficiency of their sleep and how often they awoke at night.

Source:
https://www.aan.com/PressRoom/Home/PressRelease/4864
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