Table 4.

Comparison of short (< 90 min) and long (≥ 90 min) procedure time groups

	< 90 min, n = 26	≥ 90 min, n = 22	P value
Okayama University Hospital/other hospitals, n	15/11	5/17	0.01
Reconstruction route of gastric tube, n
Antethoracic/retrosternal/posterior mediastinal	6/11/9	3/4/15	0.06
Location of lesion, n
U/L/M	0/8/18	2/10/10	0.08
Median tumor size, mm (range)	13 (4-26)	15 (6-60)	0.06
Tumor depth, n
M/SM	23/3	17/5	0.30
Ulcerative findings positive, n	2	5	0.14

U: Upper; M: Medium; L: Lower; M: Intramucosal; SM: Submucosal.