Parameter estimates for transferrin saturation and age-standardized serum ferritin concentration from the unweighted samples
| Ethnic subgroup . | Transferrin saturation (%) . | Serum ferritin concentration* (ng/mL) . | ||||
|---|---|---|---|---|---|---|
| Mixture distribution models . | Subpopulation estimates . | |||||
| Percent of population . | Mean . | SD . | N . | Mean . | 95% CI . | |
| African American men | 72.9 | 25.0 | 6.21 | 914 | 231 | (220, 240) |
| 24.9 | 37.4 | 6.38 | 309 | 256 | (240, 272) | |
| 2.1 | 63.8 | 8.54 | 29 | 313 | (234, 404) | |
| Caucasian men | 81.4 | 28.9 | 7.52 | 1898 | 174 | (169, 180) |
| 17.6 | 45.3 | 8.55 | 396 | 193 | (180, 207) | |
| 0.9 | 77.5 | 11.09 | 28 | 289 | (199, 396) | |
| African American women | 81.9 | 21.6 | 6.66 | 857 | 132 | (125, 139) |
| 17.2 | 35.6 | 6.85 | 182 | 156 | (142, 172) | |
| 0.9 | 63.9 | 7.29 | 8 | 213 | (135, 310) | |
| Caucasian women | 86.0 | 25.9 | 7.66 | 2137 | 88 | (85, 92) |
| 13.5 | 45.7 | 8.73 | 318 | 117 | (106, 128) | |
| 0.5 | 79.5 | 9.23 | 20 | 135 | (100, 169) | |
| Ethnic subgroup . | Transferrin saturation (%) . | Serum ferritin concentration* (ng/mL) . | ||||
|---|---|---|---|---|---|---|
| Mixture distribution models . | Subpopulation estimates . | |||||
| Percent of population . | Mean . | SD . | N . | Mean . | 95% CI . | |
| African American men | 72.9 | 25.0 | 6.21 | 914 | 231 | (220, 240) |
| 24.9 | 37.4 | 6.38 | 309 | 256 | (240, 272) | |
| 2.1 | 63.8 | 8.54 | 29 | 313 | (234, 404) | |
| Caucasian men | 81.4 | 28.9 | 7.52 | 1898 | 174 | (169, 180) |
| 17.6 | 45.3 | 8.55 | 396 | 193 | (180, 207) | |
| 0.9 | 77.5 | 11.09 | 28 | 289 | (199, 396) | |
| African American women | 81.9 | 21.6 | 6.66 | 857 | 132 | (125, 139) |
| 17.2 | 35.6 | 6.85 | 182 | 156 | (142, 172) | |
| 0.9 | 63.9 | 7.29 | 8 | 213 | (135, 310) | |
| Caucasian women | 86.0 | 25.9 | 7.66 | 2137 | 88 | (85, 92) |
| 13.5 | 45.7 | 8.73 | 318 | 117 | (106, 128) | |
| 0.5 | 79.5 | 9.23 | 20 | 135 | (100, 169) | |
For individuals younger than 60 years, serum ferritin concentration values were standardized to those expected at age 60.