Characteristics of the patients explored for unexplained iron deficiency anaemia (n = 35)
| Characteristic | Value |
| Mean age | 50 years (21–86) |
| Mean haemoglobin concentration | 7.8 g/100 (5–11) |
| Duration of anaemia | 4.6 years (0.2–20) |
| Number of patients taking NSAIDs | 3 (9%) |
NSAIDs, non-steroidal anti-inflammatory drugs.