Introduction: Truncal shift caused by scoliosis can be measured with a Formetric Scanner using the Maximal Thoracic Apical Deviation (MTAD) measurement. It is a well-documented complaint with regards to body-image in patients with idiopathic scoliosis (IS). Furthermore, thoracic apical deviation is an important measure in pre-operative assessment and post-operative outcomes.

Objective: The aim of this retrospective cohort study was to determine the long-term effects of an intensive course of Physiotherapy Scoliosis Specific Exercise (PSSE) on MTAD in patients with IS.

Methods: Consecutive IS patients with a single right-sided thoracic curvature who completed an intensive 4-week course of PSSE were recruited. Data was collected between April 2019 and December 2021. All patients were routinely scanned using a Formetric Scanner pre-, immediately post-, 12- and 24-months post-treatment. MTAD, measured in millimetres, was documented. Adults (>17 years old) (group 1) and children (group 2) were analysed separately.

Inclusion Criteria:

• Patients who completed the group treatment program in its entirety. Patients who have measurements obtained from all necessary time points. Patient who have Scoliosis and who have a primary thoracic curvature.

Exclusion Criteria:

• Patient who did not complete treatment or all measurements obtained. Patients who underwent surgery.

Participants were all consecutive patients at the Scoliosis SOS Clinic in London, a private healthcare clinic specializing in non-invasive treatment for Scoliosis. All patients were routinely completing their treatment.

No patient information or databases will be shared outside of the clinic