Usefulness of analyzing endoscopic features in identifying the colorectal serrated sessile lesions with and without dysplasia

Table 1 Comparison of the general and endoscopic characteristics of the colorectal sessile serrated lesions without dysplasia and sessile serrated lesions with dysplasia group

Factors	SSL-D- group (n = 217)	SSL-D+ group (n = 22)	χ2	P value
Gender			0.001	0.981
Male	120	15
Female	105	13
Age	57.25 ± 12.02	60.00 ± 11.27	1.1482	0.252
Location			4.899	0.027
Left colon	79	4
Right colon	146	24
Size				0.0941
< 10 mm	39	1
≥ 10 mm	186	27
Surface shape			8.571	0.003
Cloud-like	177	15
Mixed-like	48	13
Mucus cap			2.250	0.134
No	106	9
Yes	119	19
Color			99.6.3	< 0.0011
Pale	217	10
Reddish	8	18
Black spots			0.004	0.949
No	95	12
Yes	130	16
Microvascular varicose			57.791	< 0.0011
No	212	13
Yes	13	15
Crypt opening				< 0.0011
Type II-O	223	13
Mixed type	2	15

¹The Fisher’s exact probability method with no statistic value.

²The value of t.

SSL-D⁺: Sessile serrated lesions with dysplasia; SSL-D^-: Sessile serrated lesions without dysplasia.

Table 2 Multifactorial analysis of endoscopic features that have independent diagnostic value for colorectal sessile serrated lesions with dysplasias

Factors	Wals	P value	OR	95%CI
Location (left/right colon)	1.865	0.172	3.390	0.588-19.546
Size (< 10 mm/≥ 10 mm)	0.028	0.867	1.206	0.135-10.782
Surface shape (cloud-like/mixed-like)	0.053	0.817	1.204	0.250-5.803
Color (pale/reddish)	12.482	< 0.001	18.705	3.684-94.974
Varicose microvascular (No/Yes)	7.467	0.006	6.768	1.717-26.677
Crypt opening (II-O/mixed)	9.306	0.002	20.704	2.955-145.086

OR: Odds ratio; 95%CI: 95% confidence interval.