Search Results Use the search box below to revise your search, or start a new search. Studies (1) Variables Publications Your query returned 1 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance 1. Established Populations for Epidemiologic Studies of the Elderly, 1996-1997: Piedmont Health Survey of the Elderly, Fourth In-Person Survey [Durham, Warren, Vance, Granville, and Franklin Counties, North Carolina] (ICPSR 2744) Blazer, Dan G.; George, Linda K.