Risk of gastrointestinal malignancy in persons with iron deficiency (ID) and ID anaemia (IDA)
| Group and comparison | Percentage | Relative risk (95% CI)* |
|---|---|---|
| *Control = patients without ID or IDA; CI defined in glossary. | ||
| Men and postmenopausal women | ||
| with ID v control | 1% v 0.2% | 5.0 (1.0 to 21) |
| with IDA v control | 6% v 0.2% | 31 (9 to 107) |
| Age ≥50 years | ||
| with ID v control | 1.3% v 0.3% | 5.0 (1.1 to 21) |
| with IDA v control | 6% v 0.3% | 22 (6 to 78) |
| Age ≥65 years | ||
| with ID v control | 2.3% v 0.4% | 6.0 (1.3 to 26) |
| with IDA v control | 9% v 0.4% | 24 (7 to 81) |