Moreover, multivariate Cox analysis indicated that high CDH6 expression remained an independent risk factor for overall survival with an HR of 1.481 (95% CI: 1.206–1.819, P < 0.001), as well as age (HR = 1.040, 95% CI: 1.018–1.063, P < 0.001) among GC patients (Fig. 7b). Here, CDH6 is linked to gastric cancer.