Table 1.

Optimal Combination of Candidate Reference miRNAs by NormFinder

Group	Best miRNA Combination	Stability
Lymph node status	miR-151a-5p + miR-152-3p	0.035
Tumor volume	miR-151a-5p + miR-152-3p	0.076
Tumor stage	miR-151a-5p + miR-152-3p	0.032
HPV type	miR-151a-5p + miR-152-3p	0.091
Hypoxia status	miR-151a-5p + miR-152-3p	0.040
Age	miR-151a-5p + miR-505-3p	0.094
Recurrence	miR-151a-5p + miR-152-3p	0.055