TABLE 3.

Risk factors of incomplete resection for superficial non‐ampullary duodenal epithelial tumors (SNADET) by underwater endoscopic mucosal resection.

Variables	Univariate analysis			Multivariate analysis
	Odds ratio	95% CI	p‐value	Odds ratio	95% CI	p‐value
Tumor location
First	Ref	–	–	Ref	–	–
Second oral	0.041	0.00–0.92	0.044	0.23	0.00–2.1 × 102	0.67
Second anal	0.053	0.00–1.2	0.064	0.49	0.00–4.3 × 102	0.84
Third	0.50	0.012–20	0.71	2.4	0.00–2.9 × 103	0.81
On the fold	0.50	0.085–2.9	0.44	0.26	0.018–3.7	0.32
Tumor size (per mm)	1.4	1.1–1.7	0.0020	1.4	1.1–1.8	0.0020
Macroscopic type
0‐I	Ref	–	–	Ref	–	–
0‐IIa	0.15	0.018–1.3	0.081	0.75	0.018–31	0.88
0‐IIc	0.19	0.023–1.6	0.13	1.8	0.045–73	0.75
0‐IIa + IIc	–	–	–	–	–	–
History of biopsy	2.5	0.42–15	0.31	1.5	0.10–23	0.76