Table 1.

Clinical and pathological characteristics of DLBCL patients

	Training cohort (N = 316)		Validation cohort (N = 303)
Characteristics	Count	Percentage	Count	Percentage
Gender
Male	139	44.0%	162	53.5%
Female	177	55.7%	141	46.8%
Age
≤60 years	201	63.6%	168	55.4%
>60 years	115	36.4%	135	44.6%
Extranodal involvement
0–1	209	66.1%	228	75.2%
>1	107	33.9%	75	24.8%
Lactate dehydrogenase
Normal	170	53.8%	172	56.8%
Elevated	146	46.2%	131	43.2%
Ann Arbor stage
I–II	166	52.5%	193	63.7%
III–IV	150	47.5%	110	36.3%
Performance status (ECOG)
0–1	279	88.3%	259	85.5%
>1	37	11.7%	44	14.5%
Revised International Prognostic Index (R-IPI)
Good	80	25.3%	71	23.4%
Intermediated	132	41.8%	142	46.9%
Poor	104	32.9%	90	29.7%
BCL2/MYC double expression
Negative	234	74.1%	228	75.2%
Positive	81	25.9%	60	19.8%