Characteristics of the Population Collected in NHANES I Baseline (aged 25 to 74 years)
| Characteristic | Percent of Total (N = 104,124,97) | Percent with Transferrin Saturation >55% (N = 2,868,869) |
|---|---|---|
| Note: Population estimates for the US population aged 25 to 74 years in 1971. | ||
| NHANES I = First National Health and Nutrition Examination Survey. | ||
| * Terms used for classification by the NHANES I in 1971. | ||
| † As calculated in 1971. | ||
| Age, years | ||
| 25–34 | 25.6 | 24.6 |
| 35–52 | 39.2 | 42.1 |
| 53–69 | 30.1 | 28.0 |
| 70+ | 5.1 | 5.3 |
| Sex | ||
| Male | 47.3 | 54.7 |
| Female | 52.7 | 45.3 |
| Race* | ||
| White | 89.3 | 93.8 |
| Negro | 9.8 | 5.3 |
| Other | 0.9 | 0.9 |
| Poverty Index† | ||
| At or below | 15.1 | 18.2 |
| Above | 84.9 | 81.8 |
| Education | ||
| None | 0.9 | 0.8 |
| Primary school | 19.8 | 14.8 |
| High school | 52.2 | 46.1 |
| College | 20.5 | 23.9 |
| College graduate | 6.7 | 14.3 |