Measurement system that improves the accuracy of polyp size determined at colonoscopy

Table 1 Comparison of the methods for measuring the largest diameter (n = 192)

Method	Size (cm)	P
		VC	CE	DGBF
VC	0.85 ± 0.69	-	-	-
CE	1.10 ± 0.53	< 0.001	-	-
DGBF	0.87 ± 0.54	0.134	< 0.001	-
ELMS	0.85 ± 0.53	0.289	< 0.001	0.027

Data are expressed as mean ± SD. CE: Clinicians’ evaluation; DGBF: Disposable graduated biopsy forceps; ELMS: Endoscopic lesion measurement system; VC: Vernier caliper.