Table 1.
Patient and tumor characteristics
| Variable | Category | N | % |
|---|---|---|---|
| Age | — | 111 | 100 |
| Median 63.9 years | |||
| Mean 61.4 years | |||
| Sex | Female | 44 | 40 |
| Male | 67 | 60 | |
| Surgical treatment level | Cervical | 12 | 11 |
| Thoracic | 75 | 67 | |
| Lumbar | 24 | 22 | |
| Histology |
|
26 | 23 |
| RCC | 25 | 23 | |
| Sarcoma | 13 | 12 | |
| Thyroid | 8 | 7 | |
| Prostate | 7 | 6 | |
| Head and neck | 6 | 5 | |
| Breast | 4 | 3 | |
| Hepatocellular | 3 | 3 | |
| Melanoma | 3 | 3 | |
| Colorectal | 3 | 3 | |
| Other | 13 | 12 | |
| Preoperative SINS | Stable | 10 | 9 |
| Intermediate | 63 | 57 | |
| Unstable | 19 | 17 | |
| n/a | 19 | 17 | |
| Preoperative ECOG | 0 | 10 | 9 |
| 1 | 88 | 79 | |
| 2 | 2 | 2 | |
| 3 | 7 | 6 | |
| 4 | 4 | 4 | |
| Preoperative ASIA | C | 3 | 3 |
| D | 12 | 11 | |
| E | 96 | 86 | |
| Prior spinal procedure | At surgical level | 12 | 11 |
| At other level | 12 | 11 | |
| None | 87 | 78 |
Abbreviations: NSCLC, non-small cell lung carcinoma; RCC, renal cell carcinoma; SINS, Spinal Instability Neoplastic Score; ECOG, Eastern Cooperative Oncology Group performance status; American Spinal Injury Association Impairment Scale score.