Table 3. Two-phase validation of upregulated piRNAs identified by real-time PCR.

Up-regulated piRNA	Fold change	FDR	AUC
54 paired fresh samples
piR-hsa-13643	3.588852	0.0002	0.813
piR-hsa-21238	3.537825	0.0004	0.820
21 paired paraffin samples
piR-hsa-13643	3.462167	0.0434	0.842
piR-hsa-21238	5.437552	0.0453	0.829

Abbreviation: PIWI-interacting RNAs (piRNAs); Fold Change (FC); Area Under Curve (AUC).