Table 3. Predictors of technical difficulty.

Variable		Univariate			Multivariate
		Odds ratio	95 % CI	P value	Odds ratio	95 % CI	P value
Location	Duodenal flexure (SDA/IDA)	2.83	1.25 – 6.37	0.012 1	2.61	1.02 – 6.68	0.047 1
	Others	1			1
Site	Posterior wall	1.49	0.75 – 2.96	0.26	0.94	0.42 – 2.11	0.89
	Others	1			1
Lesion size	> 40 mm	1.08	0.86 – 1.53	< 0.01 1	5.26	2.15 – 12.9	< 0.01 1
	≤ 39 mm	1			1
Occupied	More than 1/2	12.6	4.47 – 35.7	< 0.01 1	5.80	1.83 – 18.4	< 0.01 1
circumference	Less than 1/2	1			1

SDA, supraduodenal angle; IDA, inferior duodenal angle.

¹Statistically significant