Patient characteristics at the time of sampling
| No. of patients with CD | |
| Location* | |
| Ileum (L1) | 27 |
| Colon (L2) | 6 |
| Ileocolon (L3) | 31 |
| Behaviour* | |
| Non-stricturing, non-penetrating (B1) | 25 |
| Structuring (B2) | 22 |
| Penetrating (B3) | 13 |
| Previous surgery* | |
| Yes | 40 |
| No | 20 |
| Medical treatment at time of sampling* | |
| Immunosuppressants | 10 |
| Steroids | 3 |
| NSAIDs | 3 |
| Sulfasazines | 12 |
| Mesalazines | 8 |
↵* Maximal disease extent at the time of sampling was available in 64/68 patients; disease behaviour at last follow-up before the time of sampling was available in 60/68 patients; previous surgery at the time of sampling was available in 60/68 patients (type of surgery: 5/40 unknown, 1/40 gastric Roux-en-Y anastomosis, 16/40 partial ileal and partial colonic resection, 2/40 (sub)total colectomies, 11/40 hemicolectomies, 5/40 partial ileal resection); medical treatment at the time of sampling was available in 57/68 patients.
CD, Crohn's disease; NSAIDs, non-steroidal anti-inflammatory drugs.