Evaluation of the margins of differentiated early gastric cancer by using conventional endoscopy

Table 3 The multivariate regression analysis of the factors that make the determination of the margin difficult

Factors	OR	95%CI	P value
Lcation in the U and M parts	1.769	0.940-3.331	NS
Norm-colored	2.095	1.040-4.217	0.0383
Components of flat area (0-IIb)	4.900	1.610-14.913	0.0051
Tumor size ≥ 21 mm	3.852	2.165-6.852	< 0.0001
Ulceration finding	2.307	1.156-4.604	0.0178
Components of poorly differentiated adenocarcinoma in the mucosal surface	6.65	2.590-17.073	< 0.0001

OR: Odds ratio; NS: Not significant; U: The upper third of the stomach; M: The middle third of the stomach.