Table 3.

Multivariate dichotomous logistic regression of the development group for predicting N2 metastasis.

Variable	Regression coefficient	p value	Odds ratio	95% confidence interval
				Lower	Upper
Central location	-0.756	0.029	0.469	0.239	0.924
Consolidation size (cm)	1.921	<0.001	6.824	4.095	11.373
Enlarged lymph node on CT	2.145	<0.001	8.546	4.491	16.262
Smoking history	-1.065	0.003	0.345	0.169	0.704
Level of serum CEA (ng/ml)	0.064	<0.001	1.066	1.031	1.102