Table 2: Univariate and multivariate analyses of factors affecting perforation in ESD ( ).

UnivariateMultivariate
OR (95% CI) valueOR (95% CI) value

Age (years)1.03 (0.98, 1.08)0.278
Gender
 Female 1.001.00
 Male 1.16 (0.85, 1.60)0.351
Tumor size (mm)6.53 (0.80, 53.51)0.08013.32 (1.22, 146.02)0.034
Tumor location
 Cecum13.2 (1.13, 154.92)0.04017.22 (1.25, 236.78)0.033
 Right colon 2.20 (0.23, 20.92)0.4931.05 (0.04, 11.68)0.968
  Left colon4.71 (0.45, 49.94)0.1985.65 (0.46, 69.08)0.175
  Rectum1.001.00
Macroscopic type
 LST-NG 1.00
 LST-G0.38 (0.10, 1.39)0.143
Histology
 Adenocarcinoma 1.00
 Adenoma1.46 (0.41, 5.20)0.564
Nonlifting sign, (%)
 Negative1.001.00
 Positive3.51 (1.65, 9.71)0.0405.97 (1.09, 32.63)0.039
Procedure time1.01
(0.99, 1.02)
0.352

ESD: endoscopic submucosal dissection; LST-NG: laterally spreading tumors-nongranular type; LST-G: laterally spreading tumors-granular type.