Patient-reported outcomes and radiographic parameter results examined in this study.
| Outcome Measure | Instrumented (n = 7) | Uninstrumented (n = 7) | P Value |
| Patient-reported outcomes, mean ± SD (range) | |||
| Scoliosis Research Society 7-item questionnaire | 23.4 ± 2.9 (19–27) | 23.6 ± 2.6 (18–27) | 0.93 |
| Neck Disability Index | 5.7 ± 4.5 (0–10) | 10.6 ± 4.5 (2–18) | 0.08 |
| Oswestry Disability Index | 9.7 ± 13.7 (0–34) | 9.4 ± 8.7 (0–22) | 0.97 |
| Radiographic parameters, mean ± SD | |||
| Pelvic tilt (°) | 24.0 ± 7.9 | 30.5 ± 4.7 | 0.09 |
| Pelvic incidence (°) | 61.3 ± 16.9 | 67.2 ± 9.5 | 0.47 |
| Lumbar lordosis (°) | 34.9 ± 14.4 | 42.8 ± 11.0 | 0.29 |
| Pelvic incidence minus lumbar lordosis (°) | 26.4 ± 25.1 | 24.3 ± 10.4 | 0.43 |
| Sagittal vertical axis (mm) | 38.1 ± 30.1 | 52.3 ± 21.6 | 0.37 |