The American journal of clinical nutrition
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The National Center for Health Statistics conducts a broad program of record-based systems and population surveys providing information on the health and nutritional status of the US population. The record-based systems include vital statistics and health-care surveys. ⋯ Although all of these data systems provide nutrition-related information, the NHANES collects the most directly relevant nutritional status data through interview and examination of a national probability sample of children and adults. The third NHANES is scheduled to begin in September 1988 and is designed to provide cross-sectional estimates of dietary intake and nutritional status for nutrition-monitoring purposes and to serve as the baseline for longitudinal studies of diet and health.