Table 4. Survival impact of lymph node dissection according to univariate analysis.
| Factor | All patients | Patients with positive nodes | ||||
|---|---|---|---|---|---|---|
| MS (m) | 3-YSR (%) | P | MS (m) | 3-YSR (%) | P | |
| LND | ||||||
| Not performed | 8.0 | 8.1 | Ref. | 7.0 | 4.1 | Ref. |
| Performed | 11.0 | 16.8 | 0.000 | 11.0 | 14.5 | 0.009 |
| LND number | ||||||
| 1–6 | 12.0 | 13.9 | 0.003 | 11.0 | 11.3 | 0.040 |
| 7–15 | 10.0 | 17.6 | 0.000 | 10.0 | 14.0 | 0.013 |
| 16–30 | 11.0 | 17.2 | 0.000 | 11.0 | 15.9 | 0.002 |
| 31+ | 15.0 | 19.4 | 0.000 | 14.0 | 16.6 | 0.000 |
Survival impact of undergoing lymph node dissection and the number of dissections as determined by univariate analysis in all distant metastatic gastric cancer patients, and patients with positive nodes.
Abbreviations: LND, lymph node dissection; MS, median survival; m, months; YSR, year survival rate; Ref, reference.