Table 1.
Characteristics of adults ≥65 years with and without anemia in NHANES III, Phase 2, 1991–1994
| Characteristicsa | Anemic (N=270) | Non-anemic (N=1822) | P-value |
|---|---|---|---|
| Age (years) | 75.2 (0.6) | 73.6 (0.2) | 0.007 |
| Sex, women (%) | 48.1 | 58.2 | 0.026 |
| Race, Black (%) | 19.1 | 6.8 | <0.0001 |
| Body mass index, kgm−2 (%) | |||
| <18.5 | 4.2 | 2.8 | 0.09 |
| 18.5–24.9 | 31.7 | 34.4 | |
| 25.0–29.9 | 46.7 | 37.6 | |
| ≥30 | 17.4 | 25.2 | |
| Education <12 years (%) | 53.1 | 41.8 | 0.01 |
| Current smokers (%) | 14.3 | 23.2 | 0.13 |
| Serum selenium (μmol l−1)b | 1.51 (1.47, 1.56) | 1.60 (1.59, 1.61) | 0.0003 |
| Hypertension (%) | 52.3 | 46.5 | 0.21 |
| Osteoarthritis (%) | 28.3 | 16.4 | 0.01 |
| Diabetes (%) | 20.3 | 11.3 | 0.003 |
| Congestive heart failure (%) | 10.8 | 7.5 | 0.16 |
| Stroke (%) | 9.9 | 8.4 | 0.5 |
| Angina (%) | 34.9 | 31.9 | 0.5 |
| Cancer (%) | 24.3 | 21.7 | 0.5 |
| Myocardial infarction (%) | 13.4 | 12.9 | 0.87 |
| Cardiovascular disease (%) | 42.9 | 39.9 | 0.51 |
| Renal disease (%) | 21.2 | 5.6 | 0.0001 |
a
Population-weighted means and percentages.
b
Geometric mean (95% CI).