Data collection of NSDUH assessments was conducted at the respondent’s home for about an hour. Study procedures and privacy protections were carefully explained, and respondents were assured that their names would not be recorded and their responses would be kept strictly confidential. Respondents’ demographics were assessed by computer-assisted personal interviews. Substance use and health-related questions were assessed by an audio computer-assisted self-interviewing (ACASI) method to increase honest reports of sensitive behaviors (Turner et al., 1998). The ACASI allowed respondents to either read the questions on a computer screen or listen to the questions read aloud by the computer through headphones, and then entered their responses directly into the computer. Weighted response rates of household screening and interviewing for these years were 84–91% and 72–76%, respectively (SAMHSA, 2006, 2014).
