Figure 3. Kaplan–Meier analysis of overall survival for patients with LUAD. Patients were classified according to age (age < 60 and age ≥ 60 years), sex (male and female), TNM stage (Stage I + Stage II and Stage III + Stage IV), and T stage (T1 + T2 and T3 + T4). LUAD, lung adenocarcinoma; TNM, tumor/node/metastasis.