Table 4.

Modeling Radiologist Decision on Presence of an Intestinal Stricture Using Automated Measures

a Stricture Present, Defined as Relative Lumen Narrowing, Bowel Wall Thickening and Upstream Dilation
	Odds Ratio	95% Confidence Limits		P
DIL Max	1.22	1.10	1.36	<0.001
LUM Min	0.60	0.00	1.12	0.060
b Stricture Suspected, Upstream Bowel Dilation Not Required
	Odds Ratio	95% Confidence Limits		P
LUM min	0.37	0.02,	0.81	0.009
DIL max	2.60	1.51,	4.46	<0.001
BWT max	1.58	1.03,	2.41	0.034

_aModels of radiologist identification of small bowel stricture using automatic bowel measurements had an AuROC of 0.857 with an accuracy of 87.6%. Bowel wall thickness was automatically dropped from this model due to co-linearity and no contribution to model fit as a result of maximum bowel diameter dominating model performance.

_bModels of radiologists’ identification of a possible stricture suspected, where explicit need for small bowel dilation >30 mm was not required, had an AuROC of 0.917 and accuracy of 84.4%.