The present study included data from U.S. civilian, non-institutionalized adults (>18 years of age), who completed two Waves of computer assisted personal interviews from the National Epidemiological Survey on Alcohol and Related Conditions (NESARC), a prospective survey conducted by the National Institute on Alcohol Abuse and Alcoholism (NIAAA) (Wave I, 2001–2002, n = 43,093, 81% of those eligible; Wave II 2004–2005, n = 34,653, 86.7% of wave I participants) (Dawson et al., 2007; Grant et al., 2003a; 2005). The NESARC is one of the largest, nationally representative epidemiologic surveys to date, representing residents from all 50 states and the District of Columbia using sampling frames derived from the U.S. Census. Adults aged 18–24, Hispanics, and African Americans were oversampled. All participants provided informed consent and NESARC procedures were reviewed and approved by the U.S. Census Bureau and the U.S. Office of Management and Budget.
