Does the use of computed tomography scenogram alone enable diagnosis in cases of bowel obstruction?

Table 2 Observer's concordance with the final diagnosis of obstruction in the scenogram, n (%)

	Mechanical obstruction by final diagnosis			Specificity, %	Sensitivity, %	PPV, %	NPV, %	Accuracy, %
	Yes	None	Total
I Observer
Yes	32 (76.2)	4 (100)	36 (78.3)	76.19	0	88.88	0	69.56
None	10 (23.8)	0 (0)	10 (21.7)
II Observer
Yes	35 (83.3)	4 (100)	39 (84.8)	83.31	0	89.74	0	76.08
None	7 (16.7)	0 (0)	7 (15.2)
III Observer
Yes	35 (83.3)	2 (50)	37 (80.4)	83.33	50	94.59	22.23	80.43
None	7 (16.7)	2 (50)	9 (19.6)
Total	42 (91.3)	4 (8.7)	46 (100)