Table 1.

Relationship between miR-9 expression level and clinical parameters

Clinicopathological factors	Cases	Tissue miR-9 level		P value
		High (n = 53)	Low (n = 50)
Age (years)
< 60	41	20	21	0.31
≥ 60	62	33	29
Sex distribution
Female	49	25	24	0.63
Male	54	28	26
Primary location
Supraglottic	66	21	45	0.62
Glottic	37	32	5
Thyroid cartilage invasion
Yes	33	24	9	0.024
No	70	29	41
Pathological differentiation
Moderately and highly differentiated	69	32	37	0.031
Poorly differentiated	34	21	13
T classification
T1-2	55	24	31	0.066
T3-4	48	29	19
Lymph node metastasis
Yes	31	22	9	0.009
No	74	33	41
TNM stage
I/II	43	11	32	0.011
III/IV	60	42	18