Linguistic Ability in Early Life and Alzheimer Disease in Late Life
To the Editor.
—I read with great interest the article by Dr Snowdon and colleagues.1 They found that nuns whose autobiographies had high idea density and grammatical complexity when they were young were less likely to develop Alzheimer disease in later years. However, the analysis of writing samples appears to have a potentially important omission. Of the 2 detailed samples of writing provided, that of sister A who developed Alzheimer disease and that of sister B who had not...