Table 1. Patient characteristics.

		CD	UC	HC
Discovery Set	N	102	102	102
	Age, years	36.1±9.9	35.9±9.4	36.4±8.6
	Female, n (%)	32 (31)	32 (31)	32 (31)
	Mean disease duration, years	11.0±7.4	7.8±6.7	–
	Mean age at diagnosis, years	25.1±7.7	28.1±8.5	–
	Active disease	29	38	–
	CD characteristics
	Disease location
	Small bowel	31	–	–
	Colon	9	–	–
	Both	59	–	–
	Others	3	–	–
	Behavior (Montreal classification)
	B1: non-stricturing, non-penetrating	26	–	–
	B2: stricturing	42	–	–
	B3: penetrating	34	–	–
	p: perianal disease modifier	40	–	–
	UC characteristics
	Disease location
	Proctitis	–	12	–
	Left sided colitis	–	43	–
	Entire colitis	–	47	–
	Treatment
	Enteral nutrition	44	1	–
	Steroids	12	37	–
	Salicylates	91	98	–
	Immunosuppressors	56	25	–
	Infliximab	14	0	–
	Biomarker levels	Median (interquartile range)
	Albumin (mg/dl)	4.2 (3.8–4.4)	4.5 (4.1–4.6)	4.6 (4.4–4.8)
	C-reactive Protein (mg/dl)	0.22 (0.03–0.77)	0.19 (0.03–0.25)	0.02 (0.01–0.04)
	Hemoglobin (g/dl)	12.8 (11.5–13.9)	13.9 (13.3–14.8)	15.2 (13.6–15.7)
Validation Set	n	63	120	108
	Age, years	32.3±11.2	42.6±16.2	42.4±7.9
	Female, n (%)	20 (33)	40 (33)	34 (32)

Plus-minus values are means±standard deviation.