The results showed that levels of KCNK2 (Area=0.308, 95% CI: 0.25-0.365, and P<0.0001), KCNK9 (Area=0.787, 95% CI: 0.737-0.836, and P<0.0001), KCNK15 (Area=0.298, 95% CI: 0.248-0.348, and P<0.0001), and KCNK17 (Area=0.083, 95% CI: 0.055-0.111, and P<0.0001) correlated with HCC incidence (Table 1). The gene discussed is KCNK2; the disease is hepatocellular carcinoma.