Table 1.

Correlation between IDO1 expression and clinicopathological features of 97 DLBCL patients.

		IDO1
Characteristics	Cases, n	Lower, n	Higher, n	χ2	P-value
Sex
Male	49	39	10	2.719	0.099
Female	48	31	17
Age
≤60	63	48	15	1.450	0.229
>60	34	22	12
Stage
I–II	39	33	6	5.033	0.025
III–IV	58	37	21
B symptoms
No	51	39	12	0.993	0.319
Yes	46	31	15
LDH
Normal	59	45	14	1.264	0.261
Elevated	38	25	13
IPI risk group
0–2	70	55	15	5.138	0.023
3–5	27	15	12
No. of extranodal sites
0–1	84	61	23	0.064	0.800
≥2	13	9	4
subtypes of DLBCL
GCB	15	10	5	0.189	0.664
Non-GCB	30	18	12

DLBCL diffuse large B-cell lymphoma, IDO1 indoleamine 2,3-dioxygenase 1, IPI international prognostic index, LDH lactate dehydrogenase, GCB germinal center B-cell, non-GCB non-germinal center B cell. Statistical analysis was analyzed with a two-sided χ² test.