There is a growing body of evidence in this field. Within the UK there are pilot studies completed within the NHS hospital trusts, however it could take some time before a UK based Randomised Controlled Trial (RCT) is completed and the treatment is not likely to become available within the NHS without this.
There are however x 4 Randomised Controlled Trials from around the world that rate the effectiveness of Schroth therapy in Adolescent Idiopathic Scoliosis:
Schreiber S, Parent EC, Khodayari Moez E, et al. Schroth physiotherapeutic scoliosis-specific exercises added to the standard of care lead to better Cobb angle outcomes in adolescents with idiopathic scoliosis – an assessor and statistician blinded randomized controlled trial. PLoS One 2016; 11(12): e0168746.
Monticone M, Ambrosini E, Cazzaniga D, Rocca B, Ferrante S. Active self-correction and task-oriented exercises reduce spinal deformity and improve quality of life in subjects with mild adolescent idiopathic scoliosis. Results of a randomised controlled trial. Eur Spine J 2014; 23(6): 1204-14. [http://dx.doi.org/10.1007/s00586-014-3241-y] [PMID: 24682356]
Kuru T, Yeldan İ, Dereli EE, Özdinçler AR, Dikici F, Çolak İ. The efficacy of three-dimensional Schroth exercises in adolescent idiopathic scoliosis: A randomised controlled clinical trial. Clin Rehabil 2015. [PMID: 25780260]
Wan L, Wang G-X, Bian R. Exercise therapy in treatment of essential S-shaped scoliosis: evolution of Cobb angle in breast and lumbar segment through a follow-up of half a year. Zhongguo Linchuang Kangfu [Chinese J Clin Rehab] 2005; 9: 82-4.
Studies in Schroth Best practice specifically:
Weiss HR, Klein R: Improving excellence in scoliosis rehabilitation: a controlled study of matched pairs. Pediatr Rehabil. 2006, 9 (3): 190-200.
Otman S, Kose N, Yakut Y: The efficacy of Schroth s 3-dimensional exercise therapy in the treatment of adolescent idiopathic scoliosis in Turkey. Saudi Med J. 2005, 26: 1429-1435.
Weiss HR, Seibel S: Scoliosis short-term rehabilitation (SSTR)-a pilot investigation. The Internet Journal of Rehabilitation. 2010, 1: 1. 11
Borysov, M, Borysov A, Scoliosis short-term rehabilitation (SSTR) according to ‘Best Practice’ standards – are the results repeatable? Scoliosis, 2012, Volume 7, Number 1, Page 1
Studies in Gensingen brace:
Weiss HR. Bracing can lead to a persistent correction in the treatment of Adolescent Idiopathic Scoliosis: A case report. Hard Tissue 2014 Apr 18;3(1):8.
Weiss HR, Moramarco M. Remodeling of trunk and backshape deformities in patients with scoliosis using standardized asymmetric computer-aided design/computer-aided manufacturing braces
Weiss HR, Seibel S, Kleban A. Deformity-related stress in a sample of patients with adolescent idiopathic scoliosis after brace weaning: a cross-sectional investigation. OA Musculoskeletal Medicine
Weiss HR, Kleban A. Development of CAD/CAM Based Brace Models for the Treatment of Patients with Scoliosis-Classification Based Approach versus Finite Element Modelling. Asian Spine J. 2015;9(5):661-667.
Weiss HR, Seibel S, Kleban, Tournavatis N, A Prospective Cohort Study of AIS Patients with 40° and More Treated with a Gensingen Brace (GBW): Preliminary Results. Open Orthopaedic Journal 2017 Volume: 11: Suppl-9, M8: 1558 -1567 DOI: 10.2174/1874325001711011558
Here is a selection of background reading:
Impact of spine surgery on signs and symptoms of spinal deformity,
Pediatric Rehabilitation, Month August 2005; 0: 1–21
Weiss, et al. 2006.
Physcial Exercises in the treatment of idiopathic scoliosis at risk of brace treatment
Weiss, et al. 2006.
Indications for conservative management of scoliosis (guidelines)
Negrini, et al. 2006.
Why do we treat adolescent idiopathic scoliosis? what we want to obtain and avoid in our patients SOSORT 2005
Asher and Burton, 2006.
Adolescent idiopathic scoliosis: natural history and long term treatment effects.
Weiss, et al. 2006.
Clinical improvements and radiological progress in a girl with early onset scoliosis (EOS) treated conservatively – a case study report.
Stokes, et al. 2006
Biomechanical spinal growth modulation and progressive adolescent scoliosis Test of the vicious cycle pathogenetic hypothesis: summary of an electronic focus group debate of the IBSE.
Several papers co-authored by firstname.lastname@example.org (AKA Deborah Goodall):
Weiss. H and Goodall. D
The Treatment of Adolescent Iiopathic Scoliosis (AIS) According to the present evidence
European Journal of physical rehabilitation and medicine, 44:177-93.
Weiss. H and Goodall. D, et al
Adolescent idiopathic scoliosis – to operate or not? A debate article
Patient Safety in Surgery 2008, 2:25.
Weiss, H and Goodall, D
Rate of complications in scoliosis surgery – a systematic review ofthe Pub Med literature
Scoliosis 2008, 3:9.
There are also several Cochrane reviews related to Idiopathic scoliosis treatments which you can download from google.