Brier scores for the European Spine Study Group calculator.
| Predicted | Observed | Brier Score | |
| Likelihood of improvement in ODI | 89.2% | 79.2% | 0.0013 |
| Likelihood of improvement in SRS-22 mental health | 71.1% | 66.7% | 0.0019 |
| Likelihood of improvement in SRS-22 subtotal | 87.6% | 83.3% | 0.0018 |
| Major complication at 2 y | 53.4% | 34.8% | 0.034 |
Abbreviations: ODI, Oswestry Disability Index; SRS, Scoliosis Research Society.