COL5A2 and cancer: Figure 2b revealed that the overall survival time was shorter in COL5A2 high expression group compared with that in COL5A2 low expression group (P < 0.01), and the cancer-specific survival time was shorter in COL5A2 high expression group as compared to that in COL5A2 low expression group (Figure 2c, P < 0.05). Besides, the mRNA expression of COL5A2 in four stages of GC was analyzed as well. The stage plot displayed that patients in stages II, III, and IV expressed higher level of COL5A2 than those in stage I (Figure 2d, P < 0.05).