Study Search Results Your query returned 4 results. Series results are grouped under the most relevant study. You can ungroup series results. 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. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2012 (ICPSR 34861) Johnston, Lloyd D.; Bachman, Jerald G.; O'Malley, Patrick M.; et al. 1 more results in Monitoring the Future (MTF) Series 2. National Survey on Drug Use and Health, 2004 (ICPSR 4373) United States Department of Health and Human Services. Substance Abuse and Mental Health Services Administration. Office of Applied Studies 8 more results in National Survey on Drug Use and Health (NSDUH) Series 3. Oregon Youth Substance Use Project (OYSUP), 1998-2010 (ICPSR 34263) Andrews, Judy 4. Maternal Lifestyle Study in Four Sites in the United States, 1993-2011 (ICPSR 34312) Lester, Barry; Bada, Henrietta; Bauer, Charles; et al.