That was the conclusion of a recent study published in Neurology after examining medical diagnostic records and death certificates. Over 40 percent of the people studied died of Alzheimer's, but 22 percent of the study population had no diagnosis of dementia when the study began.
"As a result, the researchers estimated that about 503,400 deaths in Americans aged 75 and older could be attributed to Alzheimer’s dementia in 2010. For people who pay attention to death statistics, that’s a stunning number. The CDC captured just 83,494 deaths from death certificates in 2011," writes Reporting on Health. Read the story.