Table 3.
Univariate analysis of survival
| At 6 months (%) | At 12 months (%) | p | |
|---|---|---|---|
| Age |
|
|
|
| ≤65 years (n = 85) |
32 |
8 |
|
| >65 years (n = 90) |
19 |
12 |
0.048 |
| Gender |
|
|
|
| Female (n = 53) |
26 |
13 |
|
| Male (n = 122) |
25 |
8 |
0.38 |
| ECOG performance score |
|
|
|
| 2 (n = 49) |
53 |
24 |
|
| 3-4 (n = 126) |
14 |
4 |
<0.001 |
| Number of involved vertebrae |
|
|
|
| 1-2 (n = 55) |
33 |
9 |
|
| ≥3 (n = 120) |
22 |
10 |
0.13 |
| Ambulatory status prior to RT |
|
|
|
| Not Ambulatory (n = 89) |
15 |
3 |
|
| Ambulatory (n = 86) |
36 |
17 |
<0.001 |
| Other bone metastases |
|
|
|
| No (n = 65) |
38 |
15 |
|
| Yes (n = 110) |
17 |
7 |
0.005 |
| Visceral metastases |
|
|
|
| No (n = 86) |
45 |
16 |
|
| Yes (n = 89) |
6 |
3 |
<0.001 |
| Time developing motor deficits |
|
|
|
| 1-7 days (n = 88) |
10 |
1 |
|
| >7 days (n = 87) |
40 |
18 |
<0.001 |
| Radiation schedule |
|
|
|
| Short-course RT (n = 90) |
21 |
11 |
|
| Longer-course RT (n = 85) |
29 |
8 |
0.19 |
| Entire cohort (n = 175) | 25 | 9 |