Search Results Use the search box below to revise your search, or start a new search. Studies (4) Variables Publications Your query returned 4 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. National Survey of Parents and Youth (NSPY), 1998-2004 -- Restricted Use Files (ICPSR 27868) David, Susan; Hornik, Robert; Maklan, David 2. Oregon Youth Substance Use Project (OYSUP), 1998-2010 (ICPSR 34263) Andrews, Judy 3. Maternal Lifestyle Study in Four Sites in the United States, 1993-2011 (ICPSR 34312) Lester, Barry; Bada, Henrietta; Bauer, Charles; et al. 4. Center for Education and Drug Abuse Research (CEDAR): Etiological and Prospective Family Study in Southwestern Pennsylvania, Baseline Data, 1990-2011 (ICPSR 33444) Tarter, Ralph E.