Table 3 Multivariate analysis of risk factors for lymph‐node metastases and distant metastases.

Lymph‐node metastasis			Distant metastasis
Variables	OR (95% CI)	p Value	Variables	OR (95% CI)	p Value
Lymphatic invasion	35.0 (8.4 to 245)	<0.001	Venous invasion	19 (2.9 to 377)	0.009
Tumour size >10 mm	8.7 (1.7 to 66)	0.0149	Tumour size >20 mm	19 (2.9 to 377)	0.009