Table 2.

Assignment.

Variables	Assignment
Gender	Male = 1, female = 2
Age (years)	<60 = 1, ≥60 = 2
TNM staging	I-II = 1, III-IV = 2
Differentiation degree	High/moderate differentiation = 1, low differentiation = 2
Tumor diameter (cm)	<3 = 1, ≤3 = 2
Tumor location	Supraglottic type = 1, glottic type = 2
History of smoking	No = 1, yes = 2
miR-206	High miR-206 expression = 1, low miR-206 expression = 2