Table 3.

Analysis of prognostic factors for mortality (based on 692 complete cases)

Factor	Hazard ratio	95% CI	P value
Age
<65	Reference	n.a.	n.a.
65–70	1.13	0.88–1.44	0.336
71–75	1.16	0.89–1.52	0.277
>75	1.36	0.98–1.89	0.067
KPS ≥ 70%	0.50	0.41–0.62	<0.001

CI, confidence interval; KPS, Karnofsky performance score.