That could be due to better education, personal wealth and cardiovascular care, according to a new study published online in Alzheimer's and Dementia. The study looked at 11,000 people ages 70 and older.
The reasons for the decline aren't fully known, but the researchers noted that older Americans are more likely than their predecessors to have more formal education, higher economic status and better care for cognitive impairment risk factors such as high blood pressure high cholesterol and smoking.
