Table 1.
Baseline clinical, imaging and surgical characteristics of patients (n = 123).
| Age (mean ± SD) | 65.6 (± 12.3) |
| Sex | |
| Female | 94 (76.4%) |
| Male | 29 (23.6%) |
| ASA PS | |
| 1 | 21 (17.1%) |
| 2 | 69 (56.1%) |
| 3 | 33 (26.8%) |
| Obesity (BMI ≥ 30.0) | 39 (31.7%) |
| Diabetes mellitus type 2 | 20 (16.3%) |
| Karnofsky Performance Status [median (25th percentile, 75th percentile)] | 80.0 (70.0, 90.0) |
| Preoperative symptoms | |
| Pain | 85 (69.1%) |
| Sensory deficits | 49 (39.8%) |
| Motor deficits | 26 (21.1%) |
| Gait ataxia | 17 (13.8%) |
| Bladder and/or bowel dysfunction | 5 (4.1%) |
| Incidental | 4 (3.3%) |
| Preoperative modified Mccormick scale | |
| I | 48 (39.0%) |
| II | 35 (28.5%) |
| III | 22 (17.9%) |
| IV | 15 (12.2%) |
| V | 3 (2.4%) |
| Dural attachment (one patient was excluded because of selective arachnoid attachment) | |
| Ventral | 37 (30.3%) |
| Lateral | 49 (40.2%) |
| Dorsal | 36 (29.5%) |
| Spinal level | |
| Cervical | 31 (25.2%) |
| Thoracic | 90 (73.2%) |
| Lumbar | 2 (1.6%) |
| Involved spinal segments | |
| ≤ 2 | 110 (89.4%) |
| >2 | 13 (10.6%) |
| Myelomalacia (T2-weighted MR-image) | |
| Present | 65 (52.8%) |
| Absent | 58 (47.2%) |
| Dural tail sign (Gd-DTPA-enhanced MR-image) | |
| Present | 18 (14.6%) |
| Absent | 105 (85.4%) |
| Calcification | |
| Present | 11 (8.9%) |
| Absent | 112 (91.1%) |
| Cyst | |
| Present | 2 (1.6%) |
| Absent | 121 (98.4%) |
| Extent of resection according to Simpson grading | |
| I | 59 (48.0%) |
| II | 59 (48.0%) |
| III | 3 (2.4%) |
| IV | 2 (1.6%) |