Table 4.

Multivariate Linear Regression Analysis for Factors Related to ESD Perforation Outcome in all ESD Perforation Cases^*

	Duration of NPO			Duration of intravenous antibiotics			Duration of hospital stay
	β	95% CI	p-value	β	95% CI	p-value	β	95% CI	p-value
Tumor size	-	-	-	0.045	0.012 to 0.077	0.009	0.047	0.016 to 0.078	0.004
Endoscopist
A	Ref			Ref			Ref
B	0.748	0.005 to 1.491	0.049	0.032	−1.323 to 1.387	0.962	0.204	−1.096 to 1.504	0.751
C	1.919	0.877 to 2.960	0.001	3.056	1.192 to 4.921	0.002	3.097	1.309 to 4.885	0.001
Success of ESD
Success	Ref
Failure	4.874	2.661 to 7.088	<0.001	-	-	-	-	-	-
Abdominal pain
Absent	Ref			Ref			Ref
Present	1.055	0.369 to 1.724	0.004	1.234	−0.041 to 2.509	0.057	1.334	0.111 to 2.557	0.033

ESD, endoscopic submucosal dissection; NPO, nil per os; β: coefficient; CI, confidence interval; Ref, reference.

^*Only the p<0.05 factors are shown in this table.