EGFR and diabetes mellitus: In the univariable analysis, prolonged OS was significantly associated with female sex (p = 0.001), absence of diabetes mellitus (p = 0.007), never smoker (p = 0.007), a PS of ≤2 (p < 0.001), a positive EGFR mutation test result (p < 0.001), no extraosseous metastasis (p = 0.003), and LMR > 3.1 (p < 0.001) (Table 1).