 (*n* = 00)                                                                                                               Fit (≥00 mL/min./0.00 m^0^)                         00                                00                                0     Cisplatin-unfit (\<00 mL/min./0.00 m^0^)            00                                00                                   **Primary site at the initiation of chemotherapy**                                                                            Resected                                             00                                00                                0.0000    Not resected                                         00                                00                                   **Metastatic site**                                                                                                           Lymph node                                           00                                00                                0.0000    Lung                                                 00                                00                                0.0000    Bone                                                 00                                0                                 0.0000    Liver                                                0                                 0                                 0    Local recurrence                                     0                                 0                                 0.0000   **Visceral metastasis (lung, liver, or bone)**                                                                                Yes                                                  00                                00                                0.0000    No                                                   00                                00                                   **Single organ metastasis**                           00                                00                                0.000   **Response after first-line chemotherapy**                                                                                    CR                                                   0                                 0                                 0.0000    PR                                                   00                                00                                    SD                                                   00                                0                                   