qFinal answer:
Mild cognitive impairment (MCI) is a condition where cognitive function is impaired, but it does not meet the criteria for dementia. The percentage of people affected by MCI who do not have dementia is not specified, but the information suggests that a significant portion of the population above 85 years experiences MCI without dementia.
Step-by-step explanation:
Mild cognitive impairment (MCI) is a condition where an individual's cognitive function is impaired, but they do not meet the criteria for dementia. According to the provided information, nearly half of those over the age of 85 exhibit at least mild cognitive impairment. However, the question specifically asks for the percentage of people affected by MCI who do not have dementia.
Since not all individuals with MCI go on to develop dementia, it is difficult to determine the exact percentage. However, the provided information suggests that a significant portion of the population over the age of 85 experiences MCI without dementia.