National Health and Nutrition Examination Survey I, 1971-1975: Near and Distant Vision

The National Health and Nutrition Examination Surveys (Cycle I) were designed to measure the nutritional status and health of the U.S. population aged 1-74 years and to obtain more detailed information on the health status and medical care needs of adults aged 25-74 years in the civilian noninstitutionalized population.

国家健康与营养状况调查（第I周期）旨在衡量美国1至74岁人群的营养状况与健康水平，并获取关于25至74岁成年人在非机构化民用人口中健康状况及医疗保健需求更为详尽的信息。