Table 5.

Risk factors for underestimation of T-staging

	Univariable analysis			Multivariable analysis
	Odds ratio	95% CI	p value	Odds ratio	95% CI	p value
Age
≥40 years	Reference
<40 years	1.34	1.02~1.77	0.037	0.89	0.66~1.20	0.441
Gender
Male	Reference
Female	1.27	1.07~1.49	0.005	1.05	0.88~1.26	0.564
Tumor size
<2 cm	Reference
≥2 cm	7.87		<0.001	6.27	4.30~9.13	<0.001
Tumor location
Distal	Reference
Middle	2.09	1.71~2.54	<0.001	1.71	1.40~2.10	<0.001
Upper	2.47	2.01~3.03	<0.001	2.04	1.65~2.52	<0.001
Diffuse	7.78	5.11~11.85	<0.001	4.36	2.84~6.70	<0.001
Histology
Intestinal	Reference
Diffuse and mixed	2.68	2.26~3.18	<0.001	2.05	1.71~2.46	<0.001