Endoscopic submucosal tunnel dissection of upper gastrointestinal submucosal tumors: A comparative study of hook knife vs hybrid knife

Table 1 Patient baseline characteristics in hook knife group and hybrid knife group n (%)

	HO group (n = 34)	HK group (n = 49)	P value
Gender, female	11 (32.4)	22 (44.9)	0.251
Age, years (range)	50.1 ± 9.4 (27-66)	46.9 ± 12.9 (19-68)	0.195
Presenting symptoms
Asymptomatic	11 (32.4)	19 (38.8)
Epigastric discomfort	10 (29.4)	14 (28.6)
Chest discomfort	8 (23.5)	11 (22.4)
Dysphagia	3 (8.8)	3 (6.1)
Regurgitation	2 (5.9)	2 (4.1)	0.965
Tumor location
Esophagus	23 (67.6)	34 (69.4)
Cardia	7 (20.6)	10 (20.4)
Stomach	4 (11.8)	5 (10.2)	0.973

HO group: Hook knife group; HK group: Hybrid knife group.