This survey, sponsored by the National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, was designed and fielded by Abt Associates, Inc, of Cambridge, Mass, and Chicago, Ill (contract ADM28189007, later designated NO1AA90007). Participating investigators with Abt Associates were Marcia Russell, PhD (via subcontract between Abt and Russell Consulting Inc), survey conceptualization, measurement and design; Mary Cay Burich Murray, MA, project director; Michael P. Battaglia, MA, sampling statistician; and J. Michael Dennis, PhD, and Anita Kneifel, BA, survey directors for hospital recruitment and data collection. Weights were developed by William D. Kalsbeek, PhD, Survey Research Unit, University of North Carolina, Chapel Hill (contract AA9705). Wendy Ahmed, MS, formerly of the Survey Research Unit, also provided valuable guidance in implementing the weighting formula. Wayne E. Johnson, PhD, of the National Center for Health Statistics contributed statistical expertise concerning design and weighting issues. Assistance in data cleaning and editing and editorial support was provided by CSR Inc, Arlington, Va, Alcohol Epidemiology Data System (contract NOAA82014). Programming and data analytic support were provided by Social and Scientific Systems, Silver Spring, Md (contract HHS100970018). In particular, Thomas Bell, MBA, programmed this very complex data set, and Constance E. Ruhl, MD, PhD, provided advice and guidance.