Demographic data of patients.
| Demographics | N = 20 |
| Age, y, mean ± SD | 73.1 ± 6.1 |
| Sex, M/F, n | 10/10 |
| History of trauma (mo before surgery), mean ± SD | 5.1 ± 3.9 |
| Follow-up, mo, mean ± SD | 18.4 ± 5.1 |
| Bone mineral density, mean ± SD | −3.0 ± 1.2 |
| Level of surgery, n (%) | |
| T11 | 1 (5%) |
| T12 | 6 (30%) |
| L1 | 8 (40%) |
| L2 | 4 (20%) |
| L3 | 1 (5%) |
| Operation time, min, mean ± SD | 118 ± 36.2 |
| Estimated blood loss, mL, mean ± SD | 216 ± 66.8 |