factor | group | No. | median survival time | log-rank | univariate |
---|---|---|---|---|---|
 |  |  | (month) | p | p |
performance status | 0–1 | 25 | 39 | 0.018 | 0.033 |
 | 2–3 | 5 | 8 |  |  |
age | ≥65 | 12 | 39 | 0.017 | 0.034 |
 | <65 | 18 | 10 |  |  |
preoperative stage (UICC§ 1997) | I – II | 9 |  | 0.87 | 0.87 |
 | III – IV | 19 | 39 |  |  |
number of cycles of chemotherapy | 1 | 5 | 9 | 0.50 | 0.501 |
 | 2 | 25 | 39 |  |  |
time interval between surgery and recurrence | >13 | 14 | Â | 0.083 | 0.212 |
 | ≤13 | 16 | 14 |  |  |
tumor response (RECIST*) | CR-PR | 22 | 39 | 0.27 | 0.277 |
 | SD-PD | 8 | 12 |  |  |
field | local | 19 | 39 | 0.17 | 0.183 |
 | T-shaped | 11 | 14 |  |  |
relapse again inside irradiated field | + | 5 | Â | 0.57 | 0.594 |
 | - | 25 | 39 |  |  |
number of recurrent regions | one | 23 | 39 | 0.19 | 0.206 |
 | multiple | 7 | 6.5 |  |  |
recurrent pattern | local | 9 | 6.0 | 0.015 | 0.024 |
 | non-local | 21 | 39.0 |  |  |