Study Search Results Your query returned 4 results. Series results are grouped under the most relevant study. You can ungroup series results. Use the search box below to revise your search, or start a new search. Results per page: 25 50 100 Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded Variable Relevance (?) Study Title/Investigator 1. Oregon Youth Substance Use Project (OYSUP), 1998-2010 (ICPSR 34263) Andrews, Judy 2. National Longitudinal Study of Adolescent Health (Add Health), 1994-2008 (ICPSR 21600) Harris, Kathleen Mullan; Udry, J. Richard 3. Drug Use Among Young American Indians: Epidemiology and Prediction, 2001-2006 and 2009-2013 (ICPSR 35062) Beauvais, Fred; Swaim, Randall 4. Health Behavior in School-Aged Children (HBSC), 2009-2010 (ICPSR 34792) Iannotti, Ronald J.