| http://www.w3.org/ns/prov#value | - This study used ???longitudinal data collected as part of the Established Populations for Epidemiologic Studies of the Elderly between 1981 and 1987 on 6,981 men and women aged 65 years and older in East Boston, Massachusetts; Iowa and Washington counties, Iowa; and New Haven, Connecticut.??? It examined factors such as age, income, education, and chronic conditions present at baseline and occurri
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