Table 2.
Comparison of tumor related factors among groups
| Total (N = 304) | |||
|---|---|---|---|
| LR [-] (N = 254) | LR [+] (N = 50) | P-value | |
| Surgical method, N (%) | |||
| Decompression | 4 (13.3) | 26 (86.7) | < 0.001 |
| Fixation | 4 (50.0) | 4 (50.0) | |
| Decompression with fixation | 168 (94.9) | 9 (5.1) | |
| Corpectomy with fixation | 78 (87.6) | 11 (12.4) | |
| Number of spinal metastases, N (%) | |||
| 1 | 83 (95.4) | 4 (4.6) | < 0.001 |
| 2 | 150 (95.5) | 7 (4.5) | |
| 3 or more | 21 (35.0) | 39 (65.0) | |
| Number of non-spinal bone metastases, N (%) | |||
| None | 41 (93.2) | 3 (6.8) | < 0.001 |
| 1 | 118 (95.9) | 5 (4.1) | |
| 2 | 80 (97.6) | 2 (2.4) | |
| 3 or more | 15 (27.3) | 40 (72.7) | |
| Degree of spinal cord compression (Bilsky grade), N (%) | |||
| 0 | 7 (70.0) | 3 (30.0) | 0.664 |
| 1 | 28 (80.0) | 7 (20.0) | |
| 2 | 83 (83.8) | 16 (16.2) | |
| 3 | 136 (85.0) | 24 (15.0) | |
| Radiation therapy, N (%) | |||
| Preoperative RTx | 146 (57.5) | 22 (44.0) | 0.104 |
| Postoperative RTx | 173 (68.1) | 23 (46.0) | 0.006 |
| Pathologic fracture, N (%) | |||
| Yes | 97 (38.2) | 45 (90.0) | < 0.001 |
| SINS | 7.71 ± 1.95 | 11.42 ± 2.43 | < 0.001 |
Data are expressed as the mean value and standard deviation for continuous variables and numbers for categorical variables
LR, local recurrence; N, number; RTx, radiation therapy; SINS: spinal instability neoplastic score