3.

Multivariate analysis of factors predicting No. 5, 6 lymph node metastasis

Variables	OR	95% CI	P
OR, odds ratio; 95% CI, 95% confidence interval.
No.4	7.447	3.871−14.328	<0.001
No.8a	2.227	1.008−4.921	0.048
No.11	1.333	1.025−1.734	0.032
Tumor size	11.368	6.051−20.552	<0.001
T stage	12.335	9.114−28.054	<0.001