Table 1.
Demographic and clinical characteristics of patients (n = 145).
| Characteristics | Total (n = 145) |
Non-IF (n = 123) |
IF (n = 22) |
|---|---|---|---|
| Age, years | |||
| Mean ± standard deviation | 46.87 ± 15.19 | 47.28 ± 14.86 | 44.55 ± 17.14 |
| Median (range) | 50 (17–74) | 50 (18–74) | 50 (17–74) |
| Sex | |||
| Female | 73 (50.3) | 62 (50.4) | 11 (50.0) |
| Male | 72 (49.7) | 61 (49.6) | 11 (50.0) |
| BMI, Kg/m2 | |||
| Mean ± standard deviation | 22.53 ± 2.94 | 22.57 ± 3.02 | 22.32 ± 2.53 |
| Tumor histological type | |||
| Primary | 79 (54.5) | 63 (51.2) | 16 (72.7) |
| Metastasis | 66 (45.5) | 60 (48.8) | 6 (27.3) |
| Surgical type | |||
| Total en bloc spondylectomy | 123 (84.8) | 104 (84.6) | 19 (86.4) |
| Total piecemeal spondylectomy | 22 (15.2) | 19 (15.4) | 3 (13.6) |
| Resected vertebral level | |||
| Thoracic | 92 (63.4) | 79 (64.2) | 13 (59.1) |
| Lumbar | 50 (34.5) | 43 (35.0) | 7 (31.8) |
| Both thoracic and lumbar | 3 (2.1) | 1 (0.8) | 2 (9.1) |
| Resection of thoracolumbar junctional region (T12 and/or L1) | |||
| No | 120 (82.8) | 105 (85.4) | 15 (68.2) |
| Yes | 25 (17.2) | 18 (14.6) | 7 (31.8) |
| Number of resected vertebrae | |||
| 1 | 117 (80.7) | 99 (80.5) | 18 (81.8) |
| ≥2 | 28 (19.3) | 24 (19.5) | 4 (18.2) |
| Mean (range) | 1.25 (1–4) | 1.24 (1–4) | 1.32 (1–3) |
| Number of instrumented vertebrae | |||
| ≤4 | 128 (88.3) | 111 (90.2) | 17 (77.3) |
| ≥5 | 17 (11.7) | 12 (9.8) | 5 (22.7) |
| Mean (range) | 4.16 (3–6) | 4.12 (3–6) | 4.36 (3–6) |
| Instrumentation spanning junctional region | |||
| No | 75 (51.7) | 65 (52.8) | 10 (45.5) |
| Yes | 70 (48.3) | 58 (47.2) | 12 (54.5) |
| Implant type | |||
| Expandable titanium cage | 75 (51.7) | 71 (57.7) | 4 (18.2) |
| Titanium mesh cage | 70 (48.3) | 52 (42.3) | 18 (81.8) |
| Bone cement augmentation around the cage | |||
| No | 65 (44.8) | 45 (36.6) | 20 (90.9) |
| Yes | 80 (55.2) | 78 (63.4) | 2 (9.1) |
IF: Implant failure.