Table 2.

The Correlation of miRNA Expression Levels between Sera and Tumor Tissues of Oral Cancer Patients

miRNA	Serum (ΔCt)	Tissue (ΔCt)	r	p Value
miR-99a-5p	2.98 ± 1.68	1.34 ± 2.62	0.203	0.342
miR-31-5p	−2.92 ± 2.13	−0.28 ± 4.00	−0.057	0.790
miR-138-5p	3.07 ± 1.56	7.54 ± 3.56	0.018	0.932
miR-21-5p	−3.42 ± 1.75	−3.62 ± 3.68	0.109	0.612
miR-375-3p	2.82 ± 1.64	6.05 ± 3.37	0.108	0.614