Table 2. Univariate and multivariate Cox regression analyses of prognostic parameters in patients with ESCC.

	Univariate analysis		Multivariate analysis
	P	Relative risk (SE)	P	Relative risk	95% confidence interval
Gender	0.019	0.583 (0.231)	0.073	0.651	0.408–1.041
Age	0.900	1.000 (0.001)	0.795	1.000	0.997–1.004
Clinical stage	<0.001	2.309 (0.101)	0.024	1.380	1.043–1.825
T classification	<0.001	1.869 (0.148)	0.245	1.244	0.861–1.797
N classification	<0.001	4.252 (0.209)	0.47	0.68	0.239–1.936
M classification	<0.001	7.049 (0.449)	0.050	2.688	0.999–7.234
Differentiation	<0.001	1.901 (0.126)	<0.001	1.689	1.292–2.208
Tumor size	<0.001	1.023 (0.004)	0.005	1.014	1.004–1.024
Expression of SOX9	<0.001	6.144 (0.21)	<0.001	3.699	2.049–6.677