Table 4.

Multivariate analysis of PFS and OS in 70–91-year-old patients

	PFS			OS
	Hazard ratio	95% CI	P	Hazard ratio	95% CI	P
Preop. KPS ≥ 70	0.71	0.37–1.37	0.31	0.73	0.38–1.40	0.34
Postop. KPS ≥ 70	0.48	0.24–0.98	0.04	0.45	0.23–0.90	0.03
Chemoradiation	0.56	0.31–1.04	0.07	0.38	0.20–0.70	0.002
Salvage therapy (+)	0.77	0.41–1.45	0.42	0.43	0.22–0.81	0.01

Abbreviations: PFS, progression free survival; OS, median overall survival; 95% CI, 95% confidence interval; KPS, Karnofsky Performance Status