Role of multidetector computed tomography in patients with acute infectious colitis

Table 5 Sensitivity and specificity of the four combined computed tomography parameters¹ for predicting viral or bacterial acute colitis prevalence

CT parameter	Viral				Bacterial
	Se (%)	Sp (%)	PPV (%)	NPV (%)	Se (%)	Sp (%)	PPV (%)	NPV (%)
Summer and all four	2.50	74.02	1.85	79.47	25.98	97.50	98.15	20.53
Summer and at least one	7.50	58.33	3.41	76.28	41.67	92.50	96.59	23.72
Winter and all four	2.50	90.69	5.00	82.59	9.31	97.50	95.00	17.41
Winter and at least one	15.00	87.75	19.35	84.04	12.25	85.00	80.65	15.96

¹Submucosal edema, mucosal enhancement, continuous distribution, and mucosal thickening.

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