Frequent nightmares may warn of a dangerous disease

Researchers from the University of Birmingham have found a link between regular disturbing dreams, cognitive decline, and an increased risk of dementia. The study involved over 600 people aged 35–64 and about 2,600 older adults. In middle-aged people, nightmares were associated with faster cognitive decline, while in older adults, they were linked to a higher risk of dementia.

Researchers from the University of Birmingham have identified a statistical association between frequent nightmares and the risk of developing dementia. The study included over 600 people aged 35 to 64 and about 2,600 older adults. None of them had been diagnosed with dementia at the start of the observation. The scientists used the Pittsburgh Sleep Quality Index to assess the frequency of disturbing dreams. Among middle-aged people, regular nightmares were associated with faster cognitive decline. In older participants, frequent bad dreams were accompanied by a higher risk of developing dementia. A similar link had previously been found in patients with Parkinson's disease. The authors emphasize that nightmares themselves do not cause dementia, but rather it is a statistical correlation. About 5% of adults experience nightmares weekly, and a significantly larger share several times a month. According to the scientists, the regularity of such dreams may be of interest for further study as an early signal of changes in the brain.