Role of multidetector computed tomography in patients with acute infectious colitis

Table 3 Sensitivity and specificity of the 11 computed tomography parameters for predicting viral or bacterial acute colitis prevalence

CT parameter	Viral				Bacterial
	Se (%)	Sp (%)	PPV (%)	NPV (%)	Se (%)	Sp (%)	PPV (%)	NPV (%)
Wall thickening1	40.0	10.3	8.0	46.7	89.7	60.0	92.0	53.3
Submucosal edema	30.0	7.4	6.0	34.9	92.6	70.0	94.0	65.1
Mucosal enhancement	27.5	11.3	5.7	44.2	88.7	72.5	94.3	55.8
Serosal involvement	5.0	53.9	2.1	74.3	46.1	95.0	97.9	25.7
Empty colon sign1	12.5	51.0	4.8	74.8	49.0	87.5	95.2	25.2
Small bowel involvement	30.0	60.3	12.9	81.5	39.7	70.0	87.1	18.5
Comb sign	2.5	85.3	3.2	81.7	14.7	97.5	96.8	18.3
Continuous distribution	25.0	15.2	5.5	50.8	84.8	75.0	94.5	49.2
Accordion sign	2.5	82.8	2.8	81.3	17.2	97.5	97.2	18.8
Mucosal thickening	5.0	33.3	1.4	64.2	66.7	95.0	98.6	35.8
Lymph node enlargement	7.5	79.4	6.7	81.4	20.6	92.5	93.3	18.6

¹Recategorized to binary values of normal vs non-normal.

CT: Computed tomography; Se: Sensitivity; Sp: Specificity; PPV: Positive predictive value; NPV: Negative predictive value.