| Non-relapse | Relapse | p value |
---|---|---|---|
Case number | 5 | 14 | Â |
Age (mean ± SD) | 68.4 ± 10.7 | 61 ± 9.6 | 0.111 |
Gender | |||
 Male | 3 | 14 | 0.012 |
 Female | 2 | 0 |  |
Tumor location | |||
 Upper/middle thoracic | 1 | 7 | 0.244 |
 Lower thoracic | 4 | 7 |  |
 Histological grade |  |  |  |
 Well/moderate | 4 | 13 | 0.421 |
 Poorly | 1 | 1 |  |
Pathologic tumor depth | |||
 T1-2 | 3 | 3 | 0.111 |
 T3-4 | 2 | 11 |  |
Lymph node metastasis | |||
 N0 | 2 | 3 | 0.418 |
 N1-3 | 3 | 11 |  |
Distant metastasis | |||
 M0 | 5 | 14 | – |
 M1 | 0 | 0 |  |
TNM stage (IUAC TNM Classification 7th edition) | |||
 1–2 | 3 | 4 | 0.211 |
 3–4 | 2 | 10 |  |
Lymphatic vessel invasion | |||
 Negative | 2 | 3 | 0.418 |
 Positive | 3 | 11 |  |
Venous invasion | |||
 Negative | 3 | 4 | 0.211 |
 Positive | 2 | 10 |  |
Curability | |||
 R0 | 5 | 14 | – |
 R1 | 0 | 0 |  |
 Preoperative chemotherapy | 0 | 2 | – |
 Preoperative chemo radiation therapy (CRT) | 0 | 1 |  |
 Postoperative chemotherapy | 0 | 2 | – |
 Postoperative CRT | 1 | 5 |  |
 Observation period (month, mean ± SD) | 138.7 ± 45.1 | 14 ± 9.2 | <0.001 |
 Duration between surgery and tumor relapse | – | 10 ± 8.4 | – |
Type of tumor relapse | |||
 Liver (H) | 0 | 5 |  |
 Lymph node (Ly) | 0 | 2 |  |
 Local (L) | 0 | 1 |  |
 H + Ly | 0 | 4 |  |
 Ly + L | 0 | 2 |  |