Table 2.

Interpretation of validated and simple intestinal ultrasound activity scores for Crohn’s disease and ulcerative colitis

IUS scoring system	BWT (mm)	iFAT	Modified LS	LBWS	Other
Crohn’s disease indices
SUS-CD (0-5)[19]	0: < 3.0		0: LS 0
	1: 3.0-4.9		1: LS 1-2
	2: 5.0-7.9		2: LS 3
	3: ≥ 8.0
Simple US score[20]	0.957 (BWT)		0.859 (LS)
Ulcerative colitis indices
MUC[21,24]	1.4 (BWT)		0: LS 0
			2: LS 1-3
UC-IUS (0-7)[25]	0: ≤ 2	0: Absent	0: LS 0	0: No loss
	1: 2.1-3.0	1: Present	1: LS 1	1: Loss is present
	2: 3.1-4.0		2: LS 2-3
	3: > 4
Civitelli UC index (0-4)[26] (pediatric)	0: ≤ 3		0: LS 0	0: No loss	Abnormal haustrations (0: Normal, 1: Abnormal)
	1: > 3		2: LS 1-3	1: Loss is present

IUS: Intestinal ultrasound; BWT: Bowel wall thickness; iFat: Inflammatory fat; LS: Limberg Score; LBWS: Loss of bowel wall stratification; UC: Ulcerative colitis; CD: Crohn’s disease.