Identification of a four-miRNA signature predicts the prognosis of papillary thyroid cancer

Table 1 Clinical characteristic of 497 patients with papillary thyroid cancer

Variable	Train cohort	Test cohort	P value
	(n = 249)	(n = 248)
Age			0.968
< 45	112	112
≥ 45	137	138
Sex			0.064
Male	75	57
Female	174	193
Vital status			0.617
Death	9	7
Alive	240	241
Stages			0.768
I	140	138
II	28	23
III	53	61
IV	28	26
T classification			0.302
T1	67	76
T2	92	74
T3	78	85
T4	12	11
Tx	0	2
N classification			0.166
N0	107	121
N1	120	99
Nx	22	28
M classification			0.584
M0	139	139
M1	3	6
Mx	107	103