Table 4.

Results of univariate Cox analyses in the prognostic risk stratification

Risk group	N	PFS			OS
		Events	HR (95% CI)	p value	Events	HR (95% CI)	p value
Low	28	20	1		6	1
Intermediate	61	52	2.01 (1.19–1.37)	0.009	27	2.83 (1.16–6.87)	0.022
High	41	38	2.73 (1.58–4.72)	< 0.001	27	5.62 (2.30–13.78)	< 0.001

CI: confidence interval; HR: hazard ratio; OS: overall survival; PFS: progression-free survival