Efficacy of forced coagulation with low high-frequency power setting during endoscopic submucosal dissection

Table 1 Patient and lesion baseline data in the S and F1-10 methods

	S method (n = 6)	F1-10 method (n = 6)	P3 value
Age, median (yr) (range)	70 (64-87)	71 (53-79)	0.81
Sex (male/female)	5:1	4:2	0.59
Lesion location, U/M/L1	3/3/0	4/2/0	0.64
Histology, well/mod/poor	6/0/0	6/0/0	1.00
Tumor size, median (mm) (range)	13.5 (8-36)	16 (6-23)	0.60
Resected size, median (mm) (range)	50.5 (33-64)	44.5 (31-56)	0.63
Depth of tumor invasion, M/SM1/SM22	4/2/0	3/1/2	0.42
Median time of treatment (min)	65	52.5	0.69
Postoperative bleeding rate	0	0	1.00
En bloc resection rate	100%	100%	1.00

¹The three portions of the stomach;

²Depth of tumor invasion was classified as follows: M, tumor confined to the mucosa; SM1, tumor confined within 0.5 mm of the muscularis mucosae; SM2, tumor invasion is 0.5 mm or deeper into the muscularis mucosae;

³Categorical variables were compared using the two-sided Fisher's exact test and χ² test. Continuous variables were compared using the Wilcoxon's rank-sum test. U: Upper third; M: Middle third; L: Lower third.