TABLE II.
Initial Logistic Regression for Predictors of Elevated Iron Levels in the NHANES 1999–2002 Data Set
| Odds ratio | 95% CI | |
|---|---|---|
| Age (year) | ||
| 20–44 | 1.00 | – |
| 45–64 | 2.32 | 1.21–4.48 |
| ≥ 65 | 3.51 | 1.62–7.58 |
| Gender | ||
| Male | 5.94 | 3.37–10.44 |
| Female | 1.00 | – |
| Race/Ethnicity | ||
| Non-Hispanic White | 1.00 | – |
| Non-Hispanic Black | 1.10 | 0.57–2.13 |
| Hispanic | 1.79 | 0.96–3.35 |
| Other Race | 1.91 | 0.51–7.22 |
| Arthritis | ||
| Yes | 1.06 | 0.59–1.91 |
| No | 1.00 | – |
| Liver condition | ||
| Yes | 3.09 | 1.18–8.08 |
| No | 1.00 | – |
| Joint pain | ||
| Yes | 1.05 | 0.63–1.74 |
| No | 1.00 | – |
| Osteoporosis | ||
| Yes | 2.66 | 1.15–6.16 |
| No | 1.00 | – |
| Diabetes | ||
| Yes | 1.21 | 0.47–3.13 |
| No | 1.00 | – |
| Congestive heart failure | ||
| Yes | 0.40 | 0.12–1.33 |
| No | 1.00 | – |
| Thyroid disease | ||
| Yes | 2.67 | 1.03–6.95 |
| No | 1.00 | – |