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Risk factors for perforation by multivariate analysis
| Factor | Odds ratio1 (95%CI) | P value |
| Mucosal deficiency (< 75% vs ≥ 75% circumference | 7.37 (1.45-37.4) | 0.016 |
| Depth of invasion (M vs SM) | 2.63 (0.57-12.2) | 0.218 |
| Predominant site (right vs left) | 2.33 (0.57-9.57) | 0.240 |
Multivariate logistic regression analysis.
