Table 3.

Summary of IUS findings.

3a. Disease activity
CD [n = 280]	Inflammation		No inflammation		Uncertain		Inconclusive
Overall	161 [57.5%]		83 [29.6%]		31 [11.1%]		5 [1.8%]
Ileum	118 [42.1%]		128 [45.7%]		23 [8.2%]		11 [3.9%]
Ascending colon	33 [11.8%]		233 [83.2%]		3 [1.1%]		11 [3.9%]
Transverse colon	26 [9.3%]		239 [85.4%]		3 [1.1%]		12 [4.3%]
Descending colon	32 [11.4%]		235 [83.9%]		6 [2.1%]		7 [2.5%]
Sigmoid	34 [12.1%]		226 [80.7%]		12 [4.3%]		8 [2.9%]
Rectum	7 [2.5%]		124 [44.3%]		8 [2.9%]		141 [50.4%]
Ileocolonic anastomosis [n = 113]	48 [17.1%]		55 [48.7%]		8 [7.1%]		3 [2.7%]
Proximal small bowel	9 [3.2%]		265 [94.6%]		0 [0%]		6 [2.1%]
Ileum affected length
Length cm	0–5	5–10	10–15	15–20	20–25	25–30	>30	Unknown
n = 118	14	28	22	8	8	8	3	27a
%	11.9%	23.7%	18.6%	6.8%	6.8%	6.8%	2.5%	22.9%
UC [n = 65]
Overall	29 [44.6%]		30 [46.2%]		6 [9.2%]		0 [0%]
Ascending colon	6 [9.2%]		58 [89.2%]		1 [1.5%]		0 [0%]
Transverse colon	7 [10.8%]		58 [89.2%]		0 [0%]		0 [0%]
Descending colon	22 [33.8%]		42 [64.6%]		1 [1.5%]		0 [0%]
Sigmoid	28 [43.1%]		33 [50.8%]		3 [4.6%]		1 [1.5%]
Rectum	25 [38.5%]		19 [29.2%]		4 [6.2%]		17 [26.2%]
3b. Complications in CD
	Present		Absent		Uncertain		Inconclusive
Stricture	48 [17.1%]		209 [74.7%]		22 [7.9%]		6 [2.1%]
Prestenotic dilation	29 [10.4%]		236 [84.3%]		8 [2.9%]		7 [2.5%]
Phlegmon	12 [4.3%]		260 [92.9%]		1 [0.4%]		7 [2.5%]
Abscess	6 [2.1%]		264 [94.3%]		3 [1.1%]		7 [2.5%]
Fistula	7 [2.5%]		261 [93.3%]		6 [1.8%]		6 [1.8%]

Uncertain = doubt regarding disease activity due to various reasons [i.e., suboptimal images, minor findings]. Inconclusive = no conclusions possible due to poor image quality

IUS, intestinal ultrasound; CD, Crohn’s disease; UC, ulcerative colitis.

^aReasons for unknown length not shown