Losing your memory -- even if you don't have dementia -- could be a signal for stroke.
In a new study, nearly one-thousand men in Sweden underwent three mental tests and were followed for 13 years.
Those who performed the worst on one of the tests had a three times greater risk for stroke than those who performed the best.
The other two tests did not predict stroke risk.
Researchers say signs of cognitive decline, regardless of dementia diagnosis, could indicate a stroke is likely.