Table 6.
Difference of Patients’ Characteristics Classified by Increase of SVA.
| SVA Increase <40 mm | SVA Increase ≥40 mm | P | |
|---|---|---|---|
| Number | 18 | 5 | |
| Age years, mean ± SD | 70.4 ± 8.4 | 74.6±3.0 | .29 |
| Sex, male–female | 2:16 | 0:5 | .44 |
| Preoperative BMI | 24.0 ± 3.9 | 25.1 ± 3.2 | .59 |
| Preoperative BMD | 0.89 ± 0.31 | 0.85 ± 0.21 | .81 |
| T-score | −1.6 ± 1.1 | −1.5 ± 1.2 | .89 |
| L5-S1 PLIF | +: 11, −: 7 | +: 5, −: 0 | .97 |
| L5-S1 fusion rate | 81.8% | 60.0% | .35 |
| Osteotomy (PSO or pVCR) | +: 3, −: 15 | +: 1, −: 4 | .86 |
| OLIF | +: 10, −: 8 | +: 4, −: 1 | .32 |
| Reoperation rate | 16.7% (3/18) | 40.0% (2/5) | .26 |
| ODI | |||
| Preoperative | 49.3 ± 12.5 | 53.0 ± 11.4 | .60 |
| Last follow-up | 25.1 ± 16.1 | 46.4 ± 8.4 | .02 |
Abbreviations: SVA, sagittal vertical axis; BMI, body mass index; BMD, bone mineral density; PLIF, posterior lumbar interbody fusion; PSO, pedicle subtraction osteotomy; pVCR, posterior vertebral column resection; OLIF, oblique lumbar interbody fusion; ODI, Oswestry Disability Index.
Boldface indicates significant difference with P value < .05.