Table 4

Factors affecting long-term clinical outcomes.

	Univariate			Multivariate
	HR	95% CI	P	HR	95% CI	P
	(A) Factors affecting progression-free survival
Age>70 vs. ≤70	1.144	0.714–1.835	0.574
Male vs. female	0.902	0.589–1.383	0.636
B-cell vs. T-cell	0.528	0.326–0.853	0.009	0.503	0.318–0.795	0.003
Ann Arbor staging
III, IV vs. I, II	0.984	0.525–1.843	0.958
Prognostic risk group
High-intermediate, high vs. Low, low-intermediate	3.018	1.699–5.358	<0.001	3.083	2.022–4.699	<0.001
EBV positive vs. negative	1.354	1.102–1.723	0.045	1.211	1.097–1.582	0.048
(B) Factors affecting the OS
Age>70 vs. ≤70	1.033	0.593–1.799	0.909
Male vs. Female	0.953	0.575–1.578	0.851
B-cell vs. T-cell	0.618	0.350–1.092	0.097	0.624	0.358–1.087	0.096
Ann Arbor staging
III, IV vs. I, II	0.987	0.441–2.209	0.975
Prognostic risk group
High-intermediate, high vs. Low, low-intermediate	4.389	2.157–8.929	<0.001	4.352	2.612–7.252	<0.001
EBV positive vs. negative	1.647	0.990–2.738	0.054	1.643	0.108–2.705	0.050