Table 2.

Univariate and multivariate analyses for overall survival

Clinicopathological variables	Univariate			Multivariate
	RR	95.0% CI	P-value	RR	95.0% CI	P-value
Age (</≥50), years	0.514	0.243–1.086	0.081	–	–	–
Gender (male/female)	0.899	0.396–2.04	0.798	–	–	–
Tumor size	0.689	0.279–1.699	0.419	–	–	–
Histological grade	0.260	0.122–0.555	0.000	0.350	0.160–0.767	0.009
TNM stage	7.842	3.695–16.642	0.000	0.167	0.077–0.360	0.000
KCNJ15 (low/high)	0.390	0.184–0.825	0.014	0.375	0.175–0.803	0.012