50 states (plus the District of Columbia) with over-samples of Blacks and Hispanics, and of respondents aged 18 to 24 years old; the household response rate was 89 percent. Both sampling frames included military personnel living off base and residents in non-institutionalized group quarters, such as boarding houses, shelters, and dormitories, and both surveys provide respondent month and year of birth. NLAES provides state identifiers for both state of birth and state of current residence, and the public-use version of the first wave of NESARC provided identifiers for state of current residence. Both surveys were conducted using computer assisted personal interviewing (CAPI), and used versions of the Alcohol Use Disorder and Associated Disabilities Interview Schedule (AUDADIS), a fully structured diagnostic interview designed to ascertain the presence of past-year and lifetime alcohol and substance use disorders according to the Diagnostic and Statistical Manual, Fourth Edition (DSM-IV™) (American Psychiatric Association 1994, Grant et al, 2001.). Informed consent was obtained from all subjects, and the U.S. Census Bureau and U.S. Office of Management and Budget reviewed and approved all procedures.
