Data for the U.S. civilian noninstitutionalized population were collected by the NHIS using computer-assisted personal interviews (CAPI). Questions on health behaviors were asked of one randomly selected adult per family in the Sample Adult component of the basic core questionnaire. This report is based on a total of 79,096 completed interviews with sample adults aged 18 years and over, representing an overall sample adult response rate of 69.2% for the 3 years combined. Statistics shown in this report were age adjusted to the 2000
U.S. standard population