TABLE 2.

The comparison of studies about existing signatures for gastric cancer.

Databases	Signature	Symbols	Survival event	AUC value	References
TCGA	Six-mRNAs	TMEM132C, PCOLCE2, UPK1B, PM20D1, FLJ35024, and SLITRK2	OS	0.604	Hu et al., 2019
TCGA	Four-mRNAs	NDRG1, NDRG2, NDRG3, and NDRG4	OS	0.679	Yu et al., 2019
TCGA, GEO	Nine-mRNAs	CST2, AADAC, SERPINE1, COL8A1, SMPD3, ASPN, ITGBL1, MAP7D2, and PLEKHS1	OS	0.696	Liu et al., 2018
TCGA	Three-lncRNAs	CYP4A22−AS1, AP000695.6, and RP11-108M12.3	OS	0.660	Cheng, 2018
TCGA	Two-lncRNAs	LINC00106 and RP11-999E24.3	OS	0.614	Qi et al., 2020