Prediction of Small Bowel Obstruction Caused by Bezoars Using Risk Factor Categories on Multidetector Computed Tomographic Findings

Table 2

MDCT findings in the bezoars, with and without small bowel obstruction.

MDCT findings	SBO group (n = 32)	Non-SBO group (n = 29)	P value
Bezoar features
Major diameter (cm ± SD)	3.24 0.53	1.62 0.72	<0.0001
Volume (cm^3  ±  SD)	14.89 6.41	2.52 2.73	<0.0001
CT value (HU SD)	55.47 23.39	173.03 68.04	<0.0001
Location [ (%)]
Proximal	1 (3.1)	5 (17.2)	0.128
Middle	10 (31.3)	11 (37.9)	0.781
Distal	21 (65.6)	13 (44.8)	0.169
Type [ (%)]
Calcareous bezoar	7 (21.9)	26 (89.7)	<0.0001
Phytobezoar	24 (75.0)	3 (10.3)	<0.0001
Trichobezoar	1 (3.1)	0	1
Secondary changes
Bowel changes
Dilatation (cm SD)	3.26 0.53	2.04 0.26	<0.0001
Obstructive degree [ (%)]
No	0	29 (100)	<0.0001
Mild	13 (40.6)	0
Moderate	15 (46.9)	0
Severe	4 (12.5)	0
Wall thickening (mm SD)	3.56 0.83	1.89 0.40	<0.0001
Wall enhancement (HU SD)
Unenhanced phase	35.69 5.85	34.03 6.40	0.296
Arterial phase	43.19 15.06	28.93 13.33	0.0001
Portal phase	65.06 17.41	46.14 11.50	<0.0001
Target sign [ (%)]	13 (40.6)	0	0.0001
Mesenteric changes [ (%)]
Vascular engorgement	17 (53.1)	0	<0.0001
Mesenteric haziness	11 (34.4)	0	0.002
Ascites	6 (18.8)	3 (10.3)	0.355

The absolute difference in the attenuation value of the bowel wall between the unenhanced and contrast-enhanced images.