The study included more than 590,000 patients.
The findings are based on 412 former Scotland internationals aged at least 30 by the end of 2020.
The study involved more than 21,000 men and women across the USA.
Regular visits to the dentist may help prevent dementia.
"These three studies show worrying associations between obstructive sleep apnea and important diseases that affect survival and quality of life."
The study offers hope.
A study of around 5,000 older people found those with the condition were 35 percent more likely to develop dementia.
The study found that sustained low pay is associated with "significantly faster" memory decline.
By Gwyn Wright via SWNS A simple blood test can spot signs of Alzheimer’s 17 YEARS before symptoms appear, according to new research. Scientists have created...
"Our idea was people with a rapidly declining sense of smell over time would be in worse shape."
