Table 1.

Study population

CharacteristicNon-IBDCDUCTotal
No. of patients98825
No. of samples1211831
Clinical disease activity (no. of patients)
 Active6612
 Inactive224
Tissue distribution (no. of samples)
 Terminal ileum3609
 Colon95822
Endoscopic evaluation of area of biopsies in active disease (no. of samples)
 Involved5611
 Noninvolved606