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The Journal of Neurology, Neurosurgery & Psychiatry reports there is moderate evidence that six sleep disorders (insomnia, fragmentation, daytime dysfunction, prolonged latency, rapid eye movement sleep behaviour disorder and excessive time in bed) significantly increases the risk of cognitive disorders.
Metanalysis of 51 previously published reports looked at sleep issues and cognitive health over time.
Individuals with insomnia were 27% more likely to develop cognitive problems.
Sleep apnea, a nighttime breathing disorder, was associated with a 29% higher risk of cognitive problems.
These findings were more apparent with increasing age.