Table 3.

Procedure-related characteristics in both groups

Variables	OSK group (n = 28)	CK group (n = 25)	P value
Total procedure time, median [IRQ], min	15.5 [11.3–22.8]	20 [13.5–42.5]	0.110
Total submucosal injection time, median [IQR], sec	186 [116.8–249.5]	265 [130.5–553.0]	0.082
Total injection number, median [IQR]	4 [3–6]	4 [3–7]	0.935
Total injection amount, median [IQR], mL	23.5 [13.5–34.8]	21.0 [15.0–54.5]	0.643
En bloc resection	27 (96.4%)	24 (96.0%)	0.935
R0 resection	27 (96.4%)	21 (84.0%)	0.122
Curative resection	25 (89.3%)	21 (84.0%)	0.570
Adverse events
Intra-procedural bleeding	2 (7.1%)	4 (16.0%)	0.404
Delayed bleeding	2 (7.1%)	0	0.492
Perforation	0	0	-

OSK one-step knife, CK conventional knife, IQR interquartile range