Table 2. Univariate and multivariate regression models were used to analyze independent risk factors for the prognosis of lung cancer patients.

Parameter	Single factor analysis				Multiple factor analysis
	Hazard ratio	95% CI	P		Hazard ratio	95% CI	P
Age	0.136	0.788–1.825	0.873		–	–	–
Gender	0.935	0.466–1.732	0.732		–	–	–
Differentiation	1.182	0.812–2.537	0.025*		0.937	0.524–1.502	0.233
TNM staging	1.922	0.878-3.212	0.022*		2.231	0.948–4.056	0.038*
Smoking or with lymph node	1.485	1.016-2.218	0.502		1.595	1.102–2.127	0.721
Metastasis	1.588	1.094–2.366	0.008*		1.219	0.866–3.815	0.016*
SALL4 expression	2.836	1.307–3.845	0.016*		2. Ooo334	1.233–3.729	0.022*

*, P<0.05. SALL4, Sal-like protein 4.