The 2001 to 2002 NESARC is a nationally representative sample of the U.S. population that has been described in detail elsewhere (Grant et al., 2004b). The target population was aged 18 years and older, and included those residing in households and group quarters. Face-to-face interviews were conducted with 43,093 respondents. The survey response rate was 81%. Blacks, Hispanics, and young adults (ages 18 to 24 years) were oversampled with data adjusted for oversampling and nonresponse. The weighted data were adjusted to represent the U.S. civilian population based on the 2000 census (Grant et al., 2004b).
