Mild cognitive impairment.
Only 20% of people over the age of 80 have what is caused “Minimal or Mild Cognitive Impairment” with a mild short-term memory loss which is not progressive and does not affect their day-to-day life.
However, about 10% per year of these mild cases can progress to Alzheimer’s dementia. Those with multiple risk factors can progress by up to 20% per year to Alzheimer’s dementia.
For more information read Dr Peter Lipski’s book “Your Elderly Parents Failing Health. Is It Ageing Or A Treatable Condition”.