Sports participation reduces the progression of idiopathic scoliosis and the need for bracing. An observational study of 511 adolescents with Risser 0-2 maturation stage

BACKGROUND: In clinics and the literature, there are doubts about the indications and contraindications of sports to support rehabilitation treatment for adolescents with idiopathic scoliosis (IS). AIM: The aim of the study is to assess sports activities' effect and frequency in a large population of adolescents with idiopathic scoliosis (IS).DESIGN: Retrospective observational cohort study.SETTING: Tertiary referral institute specialized in the conservative treatment of scoliosis. POPULATION: consecutive patients in a clinical database of age >10, with juvenile or adolescent IS diagnosis, 11-25 degrees Cobb curve, Risser Bone Maturity Score 0-2, no brace prescription, radiographic follow-up radiographs at 12 +/- 3 months.METHODS: At 12-month follow-up, radiograph, we considered progression an increase of scoliosis curve >5 degrees Cobb and failure an increase to >25 degrees Cobb -need of a brace. We calculated the Relative risk (RR) to compare the outcome of participants performing sports (SPORTS) or not (NO-SPORTS). We run a logistic regression with covariate adjustment to assess the effect of sports participation frequency on the outcome. RESULTS: We included 511 patients (mean age 11.9 +/- 1.2, 415 females). Participants in the NO-SPORTS group showed a higher risk of progression (RR=1.57, 95% CI: 1.16-2.12, P=0.004) and failure (RR=1.85, 95% CI: 1.19-2.86, P=0.007) than participants in SPORTS. Logistic regression confirmed that the more frequent the sports activities, the less probable progression (P=0.0004) and failure (P=0.004) were. CONCLUSIONS: This study shows that sports activities have a protective role against progression at 12-month follow-up in adolescents with milder forms of IS. Excluding high-level sports activities, the risks of progression and failure decrease with the increase in sports frequency per week. CLINICAL REHABILITATION IMPACT: Albeit non-specific, sports can help in the rehabilitation of patients with idiopathic scoliosis and reduce brace prescription.