TABLE 4.

Multivariate analysis of lymph node positivity.

	Multivariable analysis
	Using the largest tumor diameter			Using the aggregate tumor diameter
	Odds ratio	95% Cl for odds ratio	p value	Odds ratio	95% Cl for odds ratio	p value
Lymphovascular/perineural invasion
(+) versus (−)	3.723	2.390–5.800	<0.001	3.667	2.352–5.716	<0.001
Histological grade
III versus I–II	1.202	0.826–1.749	0.337	1.210	0.831–1.761	0.321
T stage			<0.001			<0.001
T2 versus T1	2.290	1.581–3.316	<0.001	2.643	1.776–3.934	<0.001
T3 versus T1	2.458	0.946–6.386	0.065	3.193	1.454–7.009	0.004
Multiplicity
Multifocal versus unifocal	1.722	1.107–2.681	0.016	1.149	0.722–1.929	0.559