Value of Magnifying Chromoendoscopy and Magnifying Optical Enhancement Technology in Classifying Colorectal Polyps: A Prospective Controlled Study

Table 4

Diagnostic accuracy and time in two stages.

	Overall		Stage 1		Stage 2
	ME-OE	ME-CE	ME-OE	ME-CE	ME-OE	ME-CE
Sensitivity (%)	91	85	96	87	0.90	84
Sensitivity (%)	95	96	85	93	1	98
PPV (%)	94	94	86	93	1	96
NPV (%)	92	90	95	88	93	92
Accuracy (%)	93	92	90	90	96	93
value	0.639		0.961		0.705
	0.859	0.827	0.804	0.800	0.912	0.848
Times () (s)
value	0.001		0.001		0.001

PPV: positive predictive value; NPV: negative predictive value; ME-CE: magnifying chromoendoscopy; ME-OE: magnifying optical enhancement technology; SD: standard deviation.