Goldilocks principle of minimally invasive surgery for gastric subepithelial tumors

Table 3 Factors affecting procedure time and length of stay in endoscopic submucosal dissection with backup surgery and laparoscopic surgery

Factors	Without matched data			Propensity score matching
	Adjusted mean difference	SE	P value	Adjusted mean difference	SE	P value
Procedure time
Surgery type
ESD with backup surgery	Reference			Reference
Laparoscopic surgery	-63.42	14.70	< 0.001a	-56.40	18.60	0.005a
Age	-0.43	0.42	0.304	-	-	-
Tumor size 2	22.04	13.35	0.101	-	-	-
Tumor location: middle or low	33.58	12.54	0.008a	-	-	-
Exophytic growth	-4.54	10.98	0.680	-	-	-
Pathology with malignancy	-13.81	15.59	0.378	-	-	-
Length of stay
Surgery type
ESD with backup surgery
Laparoscopic surgery	-1.215	1.089	0.267	-2.00	0.516	0.001a
Age	0.081	0.031a	0.009a	-	-	-
Tumor size 2	-0.348	0.988	0.726	-	-	-
Tumor location: middle or low	0.457	0.928	0.624	-	-	-
Exophytic growth	-0.218	0.813	0.789	-	-	-
Pathology with malignancy	-0.268	1.154	0.817	-	-	-

^aP < 0.05.

ESD: Endoscopic submucosal dissection.