COL4A1 and gastric cancer: The results showed that the expression level of COL4A1 could reflect the prognosis of GC patients to some extent (Figure 10: best separation, log-rank p = 1.47e−3, cutoff = 49.3 FPKM; median separation, log-rank p = 6.44e−2, cutoff = 65.1 FPKM), suggesting that patients with high expression of COL4A1 had worse prognosis than did those with low COL4A1 expression.