Table 3 Survival analysis of each preoperative factor
Preoperative factor | No. of patients | Survival period (months) | P value | ||
|---|---|---|---|---|---|
Mean (95% CI) | Median (95% CI) | ||||
Age | Less than 65 | 87 | 19.4 (13.6 - 25.2) | 5.8 (4.3 - 7.3) | 0.235 |
65 or more | 25 | 8.6 (5.7 - 11.6) | 6.1 (3.8 - 8.5) | ||
Gender | Male | 87 | 16.5 (11.3 - 21.7) | 5.8 (4.9 - 6.8) | 0.460 |
Female | 25 | 20.7 (9.9 - 31.4) | 8.0 (2.0 - 13.9) | ||
Spinal level | Cervical | 21 | 9.9 (3.6 - 16.2) | 4.2 (3.7 - 4.6) | 0.373 |
Thoracic | 53 | 17.7 (11.1 - 24.3) | 6.5 (3.4 - 9.7) | ||
Lumbosacral | 27 | 14.9 (8.5 - 21.3) | 5.9 (4.9 - 6.8) | ||
Multiple | 11 | 18.3 (2.4 - 34.1) | 7.7 (3.4 - 11.9) | ||
Operation type | Type 1 | 3 | 35.7 (16.2 - 55.3) | N/A | 0.228 |
Type 2 | 56 | 14.1 (9.7 - 18.6) | 5.6 (2.2 - 9.0) | ||
Type 3 | 41 | 17.6 (9.6 - 25.7) | 6.1 (5.3 - 6.9) | ||
Type 4 | 12 | 8.8 (2.1 - 15.6) | 5.3 (0.2 - 10.3) | ||
Time interval to metastasis* | None | 36 | 24.4 (14.7 - 34.1) | 7.8 (1.9 - 13.8) | 0.023* |
<1 year | 20 | 7.4 (2.9 - 11.9) | 5.1 (2.0 - 8.2) | ||
>1 year | 56 | 17.3 (10.7 - 24.0) | 5.5 (4.3 - 6.8) | ||
Time interval to operation† | Immediate | 84 | 19.7 (13.9 - 25.5) | 6.2 (3.8 - 8.7) | 0.039† |
Delayed | 28 | 8.1 (4.5 - 11.7) | 5.0 (3.0 - 7.1) | ||
Total | 112 | 17.3 (12.6 - 22.1) | 5.8 (5.0 - 6.7) | ||