National Health and Nutrition Examination Survey I, 1971-1975: Audiometric Test

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.

国家健康与营养调查（第一周期）旨在衡量美国1至74岁人群的营养状况和健康状况，并获取关于25至74岁成年人在非机构化民间人口中的健康状况和医疗护理需求的更详细信息。