Table 1.

Correlation between long non-coding RNA subclasses and clinicopathological features (one-sided Fisher's exact test).

Feature	Cluster 1 (n = 139)	Cluster 2 (n = 111)	Cluster 3 (n = 188)	Cluster 4 (n = 37)	P value
Median age (years) (Range)	60 (34–90)	62 (26–85)	61 (29–90)	59 (38–79)	0.64
Gender
Male	85	77	125	24	0.58
Female	54	34	63	13
Laterality
Right	69	54	109	21	0.31
Left	70	57	79	16
Histologic grade
G1	4	0	4	0	<10e-5
G2	71	21	88	21
G3	58	48	71	10
G4	6	41	25	1
Pathological TNM stage
I	82	22	101	27	<10e-5
II	12	10	19	6
III	32	42	42	1
IV	13	37	26	3
Primary tumor pathologic spread
T1	82	24	104	27	<0.0001
T2	14	13	25	6
T3	42	66	58	3
T4	1	8	1	1
Lymph node status
N0	67	58	80	21	0.001
N1	0	11	6	0
Metastasis
M0	125	75	163	34	<0.0001
M1	14	36	25	3