Nutrition is a major determinant of health, and the resolution of many nutritional issues of public health concern requires survey data. One of the major aims of NHANES is to provide information useful for studying the relationship among diet, nutritional status, and health. In addition to dietary intake methodologies, questionnaire material, hematological tests, and nutritional biochemistries, the assessment of nutritional status requires a series of stature, weight, and other anthropometric dimensions.