The univariate Cox analysis identified the risk score of nine prediction model genes and nine signaling pathways, including ECM receptor interaction, DNA damage repair, EMT2, Nucleotide excision repair, Base excision repair, Immune checkpoint, CD8 T effector and JAK-STAT signaling pathways, significantly associated with the prognosis of GC patients (all p<0.05; Figure 7A). Here, CD8A is linked to gastric cancer.