Endoscopic diagnosis for colorectal sessile serrated lesions

Table 1 Polyp characteristics

Polyp characteristics
Size
Diminutive (≤ 5 mm)	114
Small (6-9 mm)	82
Large (≥ 10 mm)	36
Shape (Paris classification)
Is	4
IIa	226
IIb	1
IIc	1
Location
Cecum	33
Ascending colon	61
Transvers colon	71
Descending colon	12
Sigmoid colon	42
Rectum	13
Pathology
Sessile serrated lesion	72
Hyperplastic polyp	130
Traditional serrated adenoma	1
Adenoma	7
Normal mucosa	20
Others	2

Table 2 Univariate and multivariate analyses on the diagnosis of sessile serrated lesion

Variables	Univariate analysis			Multivariate analysis
	Partial regression coefficient	95% confidence interval	P value	Partial regression coefficient	95% confidence interval	P value
Location (proximal colon)	1.094	0.374-1.813	0.003	0.197	-0.685-1.078	0.662
Size (> 5mm)	2.050	1.369-2.731	< 0.001	0.904	0.074-1.733	0.033
Mucus cap	2.548	1.657-3.440	< 0.001	1.520	0.448-2.592	0.005
Indistinct borders	2.067	1.371-2.764	< 0.001	0.926	0.075-1.778	0.033
Varicose microvascular vessel	0.668	0.088-1.248	0.024	-0.133	-0.869-0.602	0.723
Cloud-like surface	1.640	1.015-2.264	< 0.001	0.708	-0.022-1.437	0.057
Expanded crypts opening	0.367	-0.202-0.936	0.206	-0.497	-1.198-0.203	0.164