Diagnostic yield of duodenal biopsy according to indication
| Indication | Serology tested | TTG positive | IgA tested | Duodenal biopsy | Diagnostic of CD |
| Anaemia | 492/1550 | 27/492 | 210/492 | 1068/1550 | 27/1068 |
| 32.8% | 5.4% | 42.6% | 68.9% | 2.5% | |
| Weight loss | 210/559 | 12/210 | 113/210 | 410/559 | 14/410 |
| 37.6% | 5.7% | 53.8% | 73.3% | 3.4% |