Table 3. The baseline characteristics of the enrolled patients.
| Total number | 49 |
| Female/male | 22 / 27 |
| Age (years), median (range) | 68 (31–86) |
| Metastasis | |
| M0 | 22 |
| M1 | 27 |
| Pathological diagnosis | |
| Well-differentiated adenocarcinoma | 19 |
| Moderately differentiated adenocarcinoma | 19 |
| Poorly differentiated adenocarcinoma | 11 |
| Treatment | |
| Surgical resection | 0 |
| Chemotherapy (GEM-based) | 49 |
| Response to chemotherapy | |
| PR | 4 |
| SD | 13 |
| PD | 32 |
Abbreviations: M0: Distant metastasis (−)
M1: Distant metastasis (+)
PR: Partial response
SD: Stable disease
PD: Progressive disease.