Table 2.

Result of univariate analysis and multivariable analysis.

	Univariate analysis			Multivariable analysis
	HR	95% CI	P value	HR	95% CI	P value
Gender	0.807	0.506 - 1.288	0.369	0.873	0.543-1.402	0.573
(Male vs. Female)
Age	1.503	0.989-2.283	0.056	1.26	0.811-1.957	0.303
(< 65 vs. ≥ 65)
KPS	1	0.622-1.608	0.999	1.706	0.666-1.736	0.766
(≥ 80 vs. < 80)
Clinical stage	2.96	1.49-5.88	0.002	2.889	1.452-5.749	0.003
(I-II vs. III)
Timing of RT	1.381	0.770-2.478	0.278	1.315	0.722-2.396	0.37
(Early vs. Late)
PCI	0.611	0.408-0.915	0.017	0.684	0.445-1.049	0.082
(No vs. Yes)

HR, hazard ratio; CI, confidence interval; RT, radiotherapy; CRT, chemoradiotherapy; KPS, Karnofsky Performance Score.