Then, the multivariate logistic analysis using the above three parameters demonstrated that the expression level of PCAT19 (HR = 0.920, 95% CI: 0.831–1.018, p = 0.011), tumor histological grade (NT) (HR = 1.266, 95% CI: 1.048–1.529, p = 0.014, and HR = 1.236, 95% CI: 1.035–1.477, p = 0.019), and tumor stage (HR = 1.328, 95% CI: 1.115–1.583, p = 0.002) were extremely significantly associated with the overall survival of LUAD patients (Table 4A). The gene discussed is PCAT19; the disease is neoplasm.