Table 1.
Patient characteristics
| Characteristic | Total patients (%) (n = 44) |
Patients who underwent conversion surgey (%) (n = 20) |
|---|---|---|
| Age (years) | 64 (37–77)a | 68 (38–74)a |
| Gender | ||
| Male | 24 (55%) | 11 (55%) |
| Female | 20 (45%) | 9 (45%) |
| ECOG performance status | ||
| 0 | 37 (84%) | 19 (95%) |
| 1 | 5 (11%) | 1 (5%) |
| 2 | 1 (2%) | 0 (0%) |
| Previous chemotherapy | ||
| Received | 3 (7%) | 1 (5%) |
| Not received | 41 (93%) | 19 (95%) |
| Macroscopic type | ||
| Type 4 (diffuse infiltrative) | 29 (66%) | 11 (55%) |
| Non-type 4 | 15 (34%) | 9 (45%) |
| Histological type | ||
| Differentiated | 3 (7%) | 1 (5%) |
| Mixed | 9 (21%) | 4 (20%) |
| Undifferentiated | 32 (73%) | 15 (75%) |
| Extent of peritoneal metastases (JCGC 12th edition)b | ||
| P0CY1 | 2 (5%) | 2 (10%) |
| P1 | 5 (11%) | 5 (25%) |
| P2 | 5 (11%) | 2 (10%) |
| P3 | 32 (73%) | 11 (55%) |
| PCI score | 14 (0–39)a | 6 (0–25)a |
| 0–9 | 19 | 13 |
| 10–20 | 10 | 5 |
| 21–39 | 15 | 2 |
| Peritoneal cytology (CY) | ||
| Positive | 29 (66%) | 11 (55%) |
| Negative | 15 (34%) | 9 (45%) |
| Other distant metastasis | ||
| Ovary | 2 (5%) | 0 (0%) |
| Para-aortic lymph nodes | 1 (2%) | 0 (0%) |
| Absent | 41 (93%) | 20 (100%) |
aShown as media (range)
bCY1 peritoneal cytology findings positive for carcinoma cells
ECOG Eastern Cooperative Oncology Group, JCGC Japanese classification of gastric carcinoma, P0 no peritoneal metastasis, P1 metastases immediately adjacent to the stomach, P2 several scattered metastases within the peritoneal cavity, P3 numerous metastases throughout the peritoneal cavity, PCI peritoneal cancer index