Efficacy of Scoliosis Specific Exercise in Patients With Adolescent Idiopathic Scoliosis During Bracing

NCT ID: NCT03305185

Last Updated: 2023-02-06

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 98 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-12-18
• Study Completion Date: 2023-06-30

Brief Summary

The purpose of this study is to examine the effectiveness of Schroth scoliosis-specific exercises (SSE) on patients with adolescent idiopathic scoliosis (AIS) during bracing. The goal is to determine if Schroth SSE combined with bracing can is superior in controlling curve progression when compared with bracing alone. Curve progression is defined as worsening of coronal Cobb angle of 6 degrees or more.

Detailed Description

Adolescent Idiopathic scoliosis (AIS) is a three-dimensional deformity of the spine, characterized by a lateral curvature and vertebral rotation. Its prevalence is estimated to be 2.5% in children between aged 10 and 16 in Hong Kong. Curve progression occurs during pubertal growth spurt. If the primary curve does not exceed 40 degree at skeletal maturity, it is unlikely to continue to progress, and there are little or no long-term clinical consequences. However, if the curve progresses beyond 50 degree during adolescence, it may cause functional limitation, accelerated disc degeneration with potential neurological deficit, cosmetic concerns, decreased quality of life, and possible progression in adulthood. Thus, surgical correction of the deformity with instrumented spinal fusion is usually recommended if the curve reaches 50 degree during adolescence.

Currently, spinal bracing is the only the only non-operative treatment supported with high-quality evidence that can prevent curve progression. In a randomized controlled trial, Weinstein et al. recently reported in the New England Journal of Medicine that bracing was effective in preventing curve progression to threshold for surgery in 72% of cases. The trial was terminated early due to the treatment benefit in favor of bracing. Nonetheless, the authors reported a treatment failure rate of 25% in the randomized cohort, which was similar to previous published studies. Hence, despite the best available non-operative treatment, the number of adolescents ultimately requiring surgery remains substantial. Surgery is associated with medical comorbidities, can cause psychosocial stress to the children and their families, and has significant financial impact on healthcare, with the total costs of spinal surgery to correct AIS ranked second only to appendicitis among children 10 to 17 years of age. Consequently, further effective strategies to prevent scoliosis progression in children are needed.

Scoliosis-specific exercise (SSE) has been proposed as an additional non-operative intervention that may reduce curve progression during the adolescent growth spurt. However, the standard of care for non-operative treatment of AIS varies widely between North America and Europe, and the use of SSE is not universally accepted. SSE is a potentially low-cost intervention that will be of substantial benefit even if a relative risk reduction in curve progression or reaching the threshold for surgery is reduced in a modest proportion of those participating.

SSE, as opposed to generalized physiotherapy, consists of individually-adapted exercises that aim to promote spinal realignment through self-correction and stabilization, as well as modulating patterns of trunk muscles recruitment. Electromyography (EMG) of paraspinal and abdominal muscles in AIS patients revealed disrupted patterns of muscles recruitment, which are associated with a disparity in trunk isometric rotation strength between sides. AIS patients demonstrate proprioceptive and balance control problems, along with a distorted body schema, resulting in a mismatch between the actual spinal alignment and the patients' internal representation of the body. SSE aims to reverse the anomalous patterns of muscle recruitment through training, and modify the body schema with visual and somatosensory feedback. This forms the theoretical neurophysiological basis for using this treatment strategy for AIS.

Schroth SSE is one of the most studied and widely-used schools of SSE. It is a technique tailored to the type of scoliosis and the curve magnitude of each patient. It is based on vertebrae deflections and sagittal corrections that result in horizontal vertebrae de-rotation. It uses rotational breathing and postural auto-correction to reverse the underlying impairments in spinal muscle function, postural control and proprioception which contribute to the development of curvature in AIS. Patients will also be given cognitive behavioral strategies to empower them to self-manage their conditions.

Conditions

Adolescent Idiopathic Scoliosis

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Study Groups

Schroth SSE with Bracing

Patients in this group will be prescribed an outpatient-based Schroth exercise program, as per our preliminary study. It consists of an individualised eight-week outpatient program that includes four initial private training sessions, once every two weeks, where exercises will be taught to the patient and their caregivers. A home exercise program will be instituted thereafter and patients will be required to return for supervised sessions once every two months.

Group Type: EXPERIMENTAL

Schroth SSE with Bracing

Intervention Type: COMBINATION_PRODUCT

Patients in this group will be prescribed an outpatient-based Schroth exercise program, as per our preliminary study. It consists of an individualised eight-week outpatient program that includes four initial private training sessions, once every two weeks, where exercises will be taught to the patient and their caregivers. A home exercise program will be instituted thereafter and patients will be required to return for supervised sessions once every two months.

Bracing alone

Patients in the control group will receive standard level of care for bracing, which consists of education on general exercises for spinal movement, strengthening, and balancing. These patients will only attend study assessments with no extra physiotherapy sessions.

Group Type: ACTIVE_COMPARATOR

Bracing alone

Intervention Type: DEVICE

Patients in the control group will receive standard level of care for bracing, which consists of education on general exercises for spinal movement, strengthening, and balancing. These patients will only attend study assessments with no extra physiotherapy sessions.

Interventions

Schroth SSE with Bracing

Patients in this group will be prescribed an outpatient-based Schroth exercise program, as per our preliminary study. It consists of an individualised eight-week outpatient program that includes four initial private training sessions, once every two weeks, where exercises will be taught to the patient and their caregivers. A home exercise program will be instituted thereafter and patients will be required to return for supervised sessions once every two months.

Intervention Type: COMBINATION_PRODUCT

Bracing alone

Patients in the control group will receive standard level of care for bracing, which consists of education on general exercises for spinal movement, strengthening, and balancing. These patients will only attend study assessments with no extra physiotherapy sessions.

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Diagnosis of AIS
• Male or female from 10 to 15 year-old, inclusive, at the time of consent provided
• Skeletal immaturity, defined as a Risser grade (amount of ossification and eventual fusion of the iliac apophysis) of 0, 1, or 2
• Cobb angle of 25-40
• No prior conservative or surgical treatment for AIS

Exclusion Criteria

• An underlying cause or association that may cause scoliosis
• Leg length discrepancies or lower limb deformities that may interfere with spinal posture
• Previous spinal surgery
• Cognitive impairment
• Those receiving any other forms of treatment including alternative medicine for the treatment of their scoliosis
• Those who are unable to return for follow-up to complete the trial.

• Minimum Eligible Age: 10 Years
• Maximum Eligible Age: 15 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

The Hong Kong Polytechnic University

OTHER

Sponsor Role: collaborator

The University of Hong Kong

OTHER

Sponsor Role: lead

Responsible Party

Dr. Kenny Kwan

Clinical Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Dr Kenny Kwan, BMBCh(Oxon)

Role: PRINCIPAL_INVESTIGATOR

The University of Hong Kong

Locations

Duchess of Kent Children's Hospital

Hong Kong, , Hong Kong

Countries

Hong Kong

Other Identifiers

UW 16-206

Identifier Type: -

Identifier Source: org_study_id