Table 1.
Patients’ Background Data.
| Variables | Value |
|---|---|
| Number | 23 |
| Age, years (range) | 71.3 ± 7.7 (50-80) |
| Sex, male–female | 2:21 |
| Preoperative BMI, kg/m2 (range) | 24.2 ± 3.8 (17.4-31.5) |
| Preoperative BMD, g/cm2 (range) | 0.88 ± 0.29 (0.49-1.47) |
| Number of fused levels (range) | 8.5 ± 0.7 (8-10) |
| L5-S1 interbody fusion | +: 16; −: 7 |
| Osteotomy (PSO or pVCR) | +: 4; −: 19 |
| OLIF | +: 14; −: 9 |
| Follow-up period (range) | 18.5 ± 6.8 (12-30) |
| Reoperation rate | 21.7% (5/23 cases) |
Abbreviations: BMI, body mass index; BMD, bone mineral density; PSO, pedicle subtraction osteotomy; pVCR, posterior vertebral column resection; OLIF, oblique lumbar interbody fusion.