Population Characteristics of Adults Aged 30 Years and Older from the Combined NHANES II and NHANES II Mortality Study with Normal (≤55%) and Elevated (>55%) Transferrin Saturation (TS)
| Characteristics | Percent With Normal TS (n = 95,284,772) | Percent With Elevated TS (n = 1,073,696) | PValue |
|---|---|---|---|
| Age group | |||
| 30–50 y | 54.3 | 69.1 | .02 |
| 51–64 y | 30.6 | 19.7 | |
| >64 y | 15.1 | 11.2 | |
| Race | |||
| White | 88.0 | 86.6 | .88 |
| Black | 9.6 | 9.5 | |
| Other | 2.4 | 3.9 | |
| Sex | |||
| Male | 47.5 | 48.4 | .87 |
| Female | 52.5 | 51.6 | |
| Poverty income ratio | |||
| <1.0 | 14.0 | 10.2 | .27 |
| ≥1.0 | 86.0 | 89.8 | |
| Education level | |||
| Not hs graduate | 35.8 | 26.4 | .15 |
| Hs graduate | 33.8 | 35.5 | |
| Some college | 30.4 | 38.1 | |
| Body mass index | |||
| <30 kg/m2 | 85.3 | 94.6 | <.01 |
| ≥30 kg/m2 | 14.7 | 5.4 | |
| Current smoker | |||
| No | 60.1 | 40.6 | <.01 |
| Yes | 39.9 | 59.4 | |
| Health status | |||
| Excellent | 23.3 | 22.4 | .70 |
| Very good | 24.7 | 28.6 | |
| Good | 30.3 | 26.1 | |
| Fair | 15.1 | 18.6 | |
| Poor | 6.6 | 4.3 | |
| Charlson comorbidity index | |||
| 0 | 16.1 | 22.7 | .54 |
| 1 | 16.1 | 18.2 | |
| 2 | 17.2 | 13.5 | |
| >2 | 50.6 | 45.6 | |