After eliminating the influence of other factors using multivariate Cox proportional hazards regression analysis, we confirmed that tumor location (HR = 0.037, 95% CI = 0.006–0.232, p = 0.000) and a high CDK6 expression status (HR = 17.815, 95% CI = 1.706–186.035, p = 0.016) were independent risk factors for OS in the CDK6 group (Table 2). This evidence concerns the gene CDK6 and neoplasm.