1997 National Household Survey on Drug Abuse

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Survey Methodology

To reduce the number of required screenings, two selections per household were allowed. Approximately 101,000 listings were screened to identify sufficient dwelling units to yield the Hispanic and black age-domain samples. In each selected dwelling unit, a roster recording the age, race/ethnicity, and gender of all household members aged 12 or older was completed. Two, one, or no household members were selected to be interviewed using a random sampling procedure, with selection probabilities based on the race/ethnicity of the head of household and the ages of household members. The procedure was designed to ensure adequate sample sizes for the four age groups (12 to 17, 18 to 25, 26 to 34, and 35 or older) and the three racial/ethnic groups (Hispanic, black, and white). In 1993, 1994, and 1995, persons aged 18 to 34 identified as current cigarette smokers by the household screening respondents also were oversampled, although this practice was abandoned in 1996.
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This page was last updated on December 30, 2008.