Impact of tumor location on clinical outcomes of gastric endoscopic submucosal dissection

Table 5 Multivariate analysis for perforation

	Univariate analysis		Multivariate analysis
	OR (95%CI)	Pvalue	OR (95%CI)	Pvalue
Tumor size, mm
< 20	1 (reference)
≥ 20	2.470 (1.304-4.678)	0.006	1.574 (0.807-3.071)	0.183
Ulcer
-	1 (reference)
+	1.637 (0.492-5.451)	0.422
SM invasion
-	1 (reference)
+	1.041 (0.238-4.550)	0.957
Location
Non-upper third	1 (reference)
Upper third	4.433 (2.042-9.623)	< 0.001	2.783 (1.138-6.803)	0.025
Location
Non-posterior wall	1 (reference)
Posterior wall	1.451 (0.746-2.820)	0.272
Pathology
Dysplasia	1 (reference)
Carcinoma	1.755 (0.905-3.405)	0.096
Procedure time, min
< 60	1 (reference)
≥ 60	8.143 (3.390-19.561)	< 0.001	4.985 (1.978-12.565)	< 0.001
Curability
Complete resection	1 (reference)
Incomplete resection	1.842 (0.799-4.248)	0.152
Resectability
En bloc	1 (reference)
Piecemeal	7.352 (3.748-14.423)	< 0.001	4.029 (1.987-8.170)	< 0.001

SM: Submucosa.