Table 1.
Characteristics of the cohort (N=417 patients)
| Characteristic | Value |
|---|---|
| Gender male | 59 (14.2) |
| Median age at surgery (yr) | 67.2 (56.7–76.5) |
| Symptoms & clinical signs | |
| Motor and walking impairment | 199 (54.7) |
| Back limb(s) pain | 213 (58.5) |
| Paresthesia, dysesthesia | 115 (31.6) |
| Sphincter disturbance | 48 (13.2) |
| Location | |
| Cervical spine | 70 (16.8) |
| Thoracic spine | 325 (77.9) |
| Lumbar spine | 17 (4.1) |
| Sacrum | 1 (0.2) |
| Side of the meningioma insertion | |
| Right | 140 (38.3) |
| Left | 163 (44.5) |
| Midline | 62 (16.9) |
| Dural insertion | |
| Posterior or posterolateral | 143 (46) |
| Lateral | 71 (22.8) |
| Anterior or anterolateral | 97 (31.2) |
| Tumor volume (cm3) | 1.4 (0.9–2) |
| Resection status | |
| Simpson 1 | 4 (1) |
| Simpson 2 | 382 (94.6) |
| Total resection | 386 (95.5) |
| Simpson 3 | 4 (1) |
| Simpson 4 | 13 (3.2) |
| Simpson 5 | NA |
| Subtotal resection (Simpson 3, 4, & 5) | 17 (4.1) |
| Histological sub-types | |
| Meningothelial meningioma | 128 (32.4) |
| Transitional meningioma | 69 (17.5) |
| Psammomatous meningioma | 138 (34.9) |
| Median mitoses count (/10 HPFs) | 1 (1–1) |
| Median Ki-67 (MIB-1) | 5 (3–6) |
Values are presented as number (%) or median (interquartile range).
NA, not applicable; HPF, high-power field.