NATIONAL HEALTH AND NUTRITION EXAMINATION SURVEY (NHANES I)
Project Start Date04/01/1971
Project Completion Date (Actual/Projected)06/01/1974
Although a major emphasis of NHANES I was on nutrition and some limited aspects of health, a subset of 3,854 persons 25-74 years of age received a more detailed health examination. No oversampling of subgroups of the population was done in this subsample, as it had been for the major nutrition component. This subsample is representative of the U.S. population 25-74 years of age at the midpoint of NHANES I. After the nutrition survey was completed, the detailed medical examination was given to adults 25-74 years of age. This portion of the survey is referred to as the NHANES I Augmentation and was continued through October 1975, bringing the total number of persons who received a detailed examination to 6,913.
Data tapes from NHANES I are organized by subject matter. The data files comprising the NHANES I include a number of demographic and socioeconomic variables on each tape, including age, gender, race, ethnicity, income, education, and marital status.