Table 1
General characteristics of the inflammatory bowel disease population
Ulcerative colitis
Crohn’s disease
No of patients
976
483
M:F ratio
484:492
202:281
Median (range) follow up (y)
10.7 (0.03–64.3)
10.2 (0.03–57.4)
Erythema nodosum
9 (0.9%)
27 (5.6%)
Uveitis
30 (3.1%)
31 (6.4%)
Pyoderma gangrenosum
5 (0.5%)
6 (1.2%)