Table 5 Prognostic factors. Cox's proportional hazards regression model was used for univariate survival analysis.

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

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

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