Double-nylon purse-string suture in closing postoperative wounds following endoscopic resection of large (≥ 3 cm) gastric submucosal tumors

Table 3 Treatment results of lesion characteristics and inter-group comparison of 85 patients with submucosal tumors grouped by diameter subgroup

	≥ 3 cm, < 4 cm, n = 58	≥ 4 cm, < 5 cm, n = 27	P value
Perforation	0	0
Abdominal pain	5	9	0.011
Low fever	4	9	0.005
Operation time
Mean (min)	63.43 ± 16.12	82.96 ± 24.12	0.000
Closure time, single-nylon rope purse-string suture
Mean (min)	25.86 ± 6.25	28.59 ± 7.78	0.138
Closure time, second nylon rope purse-string suture
Mean (min)	5.95 ± 1.17	6.33 ± 1.64	0.470
The number of metal titanium clips
	6.21 ± 0.41	7.48 ± 0.69	0.000
Postoperative hospital stays
Mean (d)	6.47 ± 0.65	6.89 ± 0.83	0.019
Residual apparatus after operation
3 months	12	16	0.297
6 months	6	7	0.933
12 months	2	2	0.766