Table 2.

Multivariate analysis of clinical characteristics related to LLMN.

Variable	OR	95% CI	p-Value
Age	0.96	0.95-0.98	<0.001*
Hypertension
Yes	0.59	0.36-0.97	0.039*
No	Reference	–	–
Smoking
Yes	1.78	1.09-2.92	0.022*
No	Reference	–	–
Tumor size	2.63	1.97-3.52	<0.001*
Tumor location
Upper	Reference	–	–
Middle	0.40	0.27-0.60	<0.001*
Lower	0.31	0.20-0.48	<0.001*
Tumor vascularity
Yes	0.63	0.43-0.91	0.015*
No	Reference	–	–
Capsular dorsal invasion
Yes	2.90	1.23-6.81	0.015*
No	Reference	–	–
LNs size	1.45	1.11-1.88	0.006*
Irregular LNs morphology
Yes	1.75	1.14-2.68	0.01*
No	Reference	–	–
Abnormal lymphatic portal structure
Yes	0.56	0.36-0.85	0.007*
No	Reference	–	–
LNs microcalcification
Yes	1.87	1.32-2.66	<0.001*
No	Reference	–	–
LNs vascularity
Yes	2.20	1.55-3.13	<0.001*
No	Reference	–	–

^* means p-value< 0.05. LNs, lymph nodes.