Table 4.

Univariate and multivariable Cox analyses of overall IAC patient survival

Factors	Univariate analysis			Multivariable analysis
	Hazard ratio	95% Confidence interval	P value	Hazard ratio	95% Confidence interval	P value
Gender (male vs. female)	0.495	0.241–1.015	0.055
Preoperative CEA levels (<5.0 vs. ≥5.0 IU/mL)	2.511	1.245–5.065	0.010	1.865	0.850–4.090	0.120
Lymph node metastasis (absent vs. present)	2.360	1.114–5.001	0.025	2.154	1.033–4.493	0.041

CEA carcinoembryonic antigen, IAC invasive lung adenocarcinoma