Table 3. Univariate and multivariate analysis for lymph node metastasis (logistic regression model).

	Univariate analysis			Multivariate analysis
Factors	RR	95% CI	P-value	RR	95% CI	P-value
Age (<60/60 ⩽)	0.44	0.18–1.108	0.08	—	—	—
Gender (male/female)	0.86	0.41–1.79	0.69	—	—	—
Histological grade (well/moderately, poorly and mucinous)	2.26	1.05–5.02	0.04	2.21	0.84–6.09	0.11
Tumour size (<30 mm/⩾30 mm)	4.08	1.51–13.1	0.01	2.52	0.72–10.1	0.17
Tumour stage (T1/T2–T4)	4.40	1.34–19.9	0.02	1.25	0.26–7.09	0.79
Lymphatic invasion (absent/present)	9.11	3.98–22.3	<0.0001	7.67	3.01–21.1	<0.0001
Venous invasion (absent/present)	4.41	1.56–8.25	0.003	2.01	0.66–6.48	0.23
MCAK mRNA expression (T/N<3/T/N>3)	3.38	1.54–7.67	0.003	4.02	1.53–11.3	0.006

CI=confidence interval; RR=relative risk.