Table 3.

Comparison of patient characteristics in our study with two previous published studies

Characteristics	Our study (FUSCC China)	Lee et al,9 Korea	χ2	P-value	Kim et al,11 Korea	χ2	P-value
	N=28	N=262			N=208
Gender
Male	18	170	0.004	0.950	131	0.018	0.893
Female	10	92			77
Age at diagnosis (years)
>60	3	55	1.670	0.196	141	33.796	<0.001
≤60	25	207			67
ECOG
0–1	13	228	29.688	<0.001	187	36.082	<0.001
2–3	15	34			21
Ann Arbor stage
I + II	19	200	0.984	0.321	145	0.040	0.841
III + IV	9	62			63
LDH before HLH
Normal	13	166	0.159	0.69	125	0.008	0.927
Elevated	9	96			83
Subtypes
UNKTL	16	222	13.085	<0.001	167	7.592	0.006
EUNKTL	12	40			41
NKPI
0–1	18	128	0.35	0.554	110	1.292	0.25
≥2	10	91			98
Cutaneous involvement
Yes	10	7	50.049	<0.001	NA
No	18	255			NA

Abbreviations: ECOG, Eastern Cooperative Oncology Group; EUNKTL, extra-upper aerodigestive tract NK/T-cell lymphoma; FUSCC, Fudan University Shanghai Cancer Center; HLH, hemophagocytic lymphohistiocytosis; LDH, lactic dehydrogenase; NKPI, NK/T-cell lymphoma prognostic index; UNKTL, upper aerodigestive tract NK/Tcell lymphoma.