The National AIDS Behavioral Surveys (NABS) were designed to identify AIDS-relevant risk behaviors and their correlates in a population based sample of adults aged 18-75 residing in the contiguous United States. The overall study design allows for the description of sexual practices, drug use, HIV antibody test seeking, and levels of AIDS-related knowledge, beliefs and social skills over the adult life-span both for the U.S. as a whole and for the major high AIDS prevalence areas. Emphasis was placed on oversampling black and Hispanic populations with the major AIDS epicenters. The specific aims of the survey included:

PETRA Dataset #01 is comprised of a subset of the RDD Central City Sample (a partially overlapping, separately weighted RDD Central City Sample) divided into seven non-combinable subsamples from the following high risk urban areas: Chicago (n=951), Detroit (n=566), Houston (n=526), Los Angeles (n=839), Miami (n=494), New York (n=555), and Philadelphia (n=549). These samples, when properly weighted, may be used to make separate, individual estimates for large, high-risk metropolitan areas.