Table 1 Clinical characteristics of 338 patients with esophageal squamous cell carcinoma
| Â | N | % |
|---|---|---|
Gender | ||
 Male | 227 | 67.16% |
 Female | 111 | 32.84% |
Age Groups (year) | ||
 31–40 | 11 | 3.26% |
 41–50 | 72 | 21.30% |
 51–60 | 127 | 37.57% |
 61–70 | 111 | 32.84% |
 71–80 | 17 | 5.03% |
Smoking history | ||
 Yes | 174 | 51.48% |
 No | 164 | 48.52% |
Alcohol history | ||
 Yes | 143 | 42.31% |
 No | 195 | 57.69% |
Clinical TNM classification | ||
 Stage I-II | 97 | 28.70% |
 Stage III-IV | 241 | 71.30% |
Tumor length (cm), mean (± SD) | 5.96 (± 2.03) |  |
Tumor location | ||
 Upper thoracic | 95 | 28.11% |
 Middle thoracic | 167 | 49.41% |
 Lower thoracic | 76 | 22.48% |
Adverse event | ||
 Grade ≥ 3 | 36 | 10.65% |
 Grade < 3 | 302 | 89.35% |