Characteristic | Number of patients |
---|---|
Age at radiotherapy | Â |
 66 years or less | 140 |
 More than 66 years | 158 |
Gender | Â |
 Male | 255 |
 Female | 43 |
Performance status | Â |
 0 | 54 |
 1 | 201 |
 2 | 27 |
 Unknown | 16 |
Primary site | Â |
 Upper thoracic esophagus | 91 |
 Middle thoracic esophagus | 160 |
 Lower thoracic esophagus | 47 |
Stage | Â |
 II | 93 |
 III (non-T4) | 134 |
 III (T4) | 71 |
Protocol | Â |
 Group A | 48 |
 Group B | 159 |
 Group C | 91 |
Radiotherapy dose | Â |
 60 Gy or less | 221 |
 More than 60 Gy | 77 |
Concomitant chemotherapy | Â |
 1 cycle | 42 |
 2 cycles | 256 |
Adjuvant chemotherapy | Â |
 With | 67 |
 Without | 231 |