Table 1. Patient and treatment characteristics.
| Characteristics | No. of patients | Proportion |
|---|---|---|
| Gender | ||
| Male | 48 | 65.8% |
| Female | 25 | 34.2% |
| Age at diagnosis | ||
| < 60 | 47 | 64.4% |
| ≥60 | 26 | 35.6% |
| NAC regimen | ||
| Doublet | 37 | 50.7% |
| Triplet | 36 | 49.3% |
| Clinical response to NAC (RECIST)* | ||
| SD | 20 | 27.4% |
| PR | 50 | 68.5% |
| Type of resection | ||
| R0 | 64 | 87.7% |
| R1 | 5 | 6.8% |
| R2 | 4 | 5.5% |
| Graded pathologic response | ||
| Minor | 40 | 54.8% |
| Moderate | 19 | 26.0% |
| Major | 14 | 19.2% |
| N stage | ||
| N0 | 19 | 26.0% |
| N1 | 15 | 20.5% |
| N2 | 13 | 17.8% |
| N3 | 26 | 35.6% |
| Lymph node metastasis ratio | ||
| NR0 | 27 | 37.0% |
| NR1 | 15 | 20.5% |
| NR2 | 19 | 26.0% |
| NR3 | 12 | 16.4% |
| vascular invasion‡ | ||
| Yes | 19 | 26.0% |
| No | 53 | 72.6% |
| Nervous invasion§ | ||
| Yes | 8 | 11.0% |
| No | 64 | 87.7% |
| Adjuvant Chemotherapy║ | ||
| Yes | 51 | 70.0% |
| No | 22 | |
| Postoperative Radiotherapy¶ | ||
| Yes | 8 | 11.0% |
| No | 65 |
* Tumor response to NAC was not evaluated for 3 patients; 2 of them developed ileus during treatment, and the other one missed assessment for personal reasons.
‡/§ vascular invasion and nervous invasion status were not reported for one patient.
║51 patients were administered post-surgery chemotherapy and had medical records in our hospital;The post-surgery chemotherapy records of 22 patients was not known.
¶ 8 patients received post-operative radiotherapy.