Table1. Clinicopathological features of each group in the original and propensity score-matched cohort.

	Original cohort				Propensity score-matched cohort
	BLI group	NBI group	P value	SD	BLI group	NBI group	P value	SD
Lesions	499	1459	–	–	471	471	–	–
Macroscopic type, number (%)
Polypoid	321 (64.5)	843 (57.8)	0.011	0.049	299 (63.5)	293 (62.2)	0.736	0.01
Non-polypoid	178 (35.5)	616 (42.2)			172 (36.5)	178 (37.8)
Lesion size (mm, mean ± SD)	7.9  ±  9.02	10.2 ± 11.3	< 0.001	0.23	7.97 ± 9.14	7.91 ± 9.56	0.92	0.006
Lesion location, number (%)
Right-sided colon	279 (55.9)	844 (57.8)	0.482	0.014	277 (58.8)	272 (57.7)	0.792	0.008
Left-sided colon	163 (32.7)	472 (32.4)	0.941	0.002	154 (32.7)	157 (33.3)	0.89	0.005
Rectum	57 (11.4)	143 (9.8)	0.344	0.018	40 (8.5)	42 (8.9)	0.908	0.005
Histological findings, number (%)
HP/SSL	65 (13.0)	103 (7.1)	< 0.001	0.86	42 (8.9)	39 (8.3)	0.816	0.008
LGD	394 (78.9)	1111 (76.1)	0.23	0.03	389 (82.6)	396 (84.1)	0.6	0.014
HGD	21 (4.1)	90 (6.2)	0.14	0.034	21 (4.5)	17 (3.6)	0.62	0.016
T1a	3 (0.5)	27 (1.9)	0.079	0.046	3 (0.6)	2 (0.4)	1	0.01
T1b	16 (3.6)	128 (8.8)	< 0.001	0.077	16 (3.4)	17 (3.6)	1	0.004

HP, hyperplastic polyp; SSL, sessile serrated lesion; LGD, low-grade dysplasia; HG, high-grade dysplasia.