Table 1. Subjects characteristics.

	Control	Crohn's disease		Ulcerative colitis
Subjects	63	94		37
Gender (F/M)	33/30	34/60		18/19
Median age, y (IQ range)	14 (10–16)	14 (11.75–15)		15 (12.5–17)
Disease activity (Inactive/mild/moderate/severe)*	NA	3/19/25/47		1/4/16/16
Inflammation location†	NA	Upper GIT	1	E1	2
		Ileum	28	E2	2
		Colon	18	E3	5
		Ileum–colon	47	E4	28

^*Estimated based on PCDAI/PUCAI; Pediatric CD/UC Activity Index.

^†E1, ulcerative proctitis; E2, left-sided UC; E3, extensive UC; and E4, pancolitis.