Table 2.

Relationship between the clinical features and KLRK1 expression in patients with lung cancer.

Clinical characteristics	Variable	Number of patients	KLRK1				χ2	P value
			High	%	Low	%
Age	< 55	109	71	(10.41)	38	(12.34)	0.620	0.431
	≥ 55	881	611	(89.59)	270	(87.66)
Gender	Female	407	301	(42.94)	106	(33.44)	7.819	0.005
	Male	611	400	(57.06)	211	(66.56)
Histological type	Lung adenocarcinoma	517	381	(54.35)	136	(42.77)	11.285	0.001
	Lung squamous cell carcinoma	502	320	(45.65)	182	(57.23)
Stage	I	521	386	(55.86)	135	(42.86)	15.336	0.001
	II	284	181	(26.19)	103	(32.70)
	III	168	102	(14.76)	66	(20.95)
	IV	33	22	(3.18)	11	(3.49)
T classification	T1	284	229	(32.67)	55	(17.35)	29.391	< 0.001
	T2	571	373	(53.21)	198	(62.46)
	T3	118	69	(9.84)	49	(15.46)
	T4	42	27	(3.85)	15	(4.73)
	TX	3	3	(0.43)	0	(0)
N classification	N0	652	461	(65.86)	191	(60.25)	5.610	0.218
	N1	227	146	(20.86)	81	(25.55)
	N2	114	75	(10.71)	39	(12.30)
	N3	7	4	(0.57)	3	(0.95)
	NX	17	14	(2.00)	3	(0.95)
M classification	M0	758	516	(74.03)	242	(77.32)	1.904	0.383
	M1	32	21	(3.01)	11	(3.51)
	MX	220	160	(22.96)	60	(19.17)
Radiation therapy	No	782	540	(88.38)	242	(86.12)	0.711	0.399
	Yes	110	71	(11.62)	39	(13.88)
Residual tumor	R0	743	513	(90.80)	230	(88.8)	3.305	0.336
	R1	25	14	(2.48)	11	(4.25)
	R2	8	4	(0.71)	4	(1.54)
	RX	48	34	(6.02)	14	(5.41)
Vital status	Deceased	404	253	(36.09)	151	(47.63)	11.673	0.001
	Living	614	448	(63.91)	166	(52.37)
Sample type	Primary tumor	1017	699	(99.71)	318	(100)	0.036	0.850
	Recurrent tumor	2	2	(0.29)	0	(0)

X represents uncertain.