Inclusion and exclusion criteria.
| Criteria | Inclusion | Exclusion |
| Treatment | Surgical treatment by posterior instrumented fusion | Additional anterior surgical procedure or previous treatment with a growing rod system |
| Scoliosis type | Adolescent idiopathic scoliosis | Nonidiopathic scoliosis (ie, early-onset or neuromuscular) |
| Data set | Complete set of data including full spine x-rays in posterior-anterior and lateral views before and after surgery and at end of follow-up | Incomplete set of data |
| Follow-up | ≥24 months | <24 months |