Machine Learning-Guided LIV Selection for Adolescent Idiopathic Scoliosis
A Prospective Randomized Controlled Trial of the Drum Tower Rule Machine Learning Model for Lowest Instrumented Vertebra Selection in Lenke Type 1 and Type 5 Adolescent Idiopathic Scoliosis
This study will evaluate whether a machine learning-based decision support model, called the Drum Tower Rule, can help surgeons select the lowest instrumented vertebra during corrective surgery for adolescent idiopathic scoliosis.
Patients with Lenke type 1 or Lenke type 5 adolescent idiopathic scoliosis who are scheduled for posterior spinal fusion will be randomly assigned to one of two groups. In the model-guided group, surgeons will receive the model-predicted risk of postoperative distal adding-on and a recommendation for lowest instrumented vertebra selection. In the conventional-experience group, surgeons will select the lowest instrumented vertebra according to routine clinical experience and existing surgical principles, without access to the model output.
All patients will receive standard posterior spinal fusion. The main outcome is the incidence of distal adding-on at 24 months after surgery, assessed by blinded radiographic reviewers.
Visão geral do estudo
Status
Status
Condições
Condições
Intervenção / Tratamento
Intervenção / Tratamento
Descrição detalhada
Adolescent idiopathic scoliosis is a common spinal deformity in children and adolescents. For patients requiring corrective surgery, selection of the lowest instrumented vertebra is a key surgical decision. An inappropriate distal fusion level may increase the risk of postoperative distal adding-on, coronal imbalance, unnecessary loss of spinal mobility, or revision surgery.
The Drum Tower Rule is a machine learning-based decision support model developed to estimate the risk of postoperative distal adding-on and assist with lowest instrumented vertebra selection in patients with Lenke type 1 and Lenke type 5 adolescent idiopathic scoliosis. Before the start of this trial, the model, input variables, risk threshold, and software version will be locked and will not be modified during the study.
This is a single-center, prospective, randomized, open-label, parallel-group controlled trial with blinded outcome assessment. Eligible participants will be randomly assigned in a 1:1 ratio to either the model-guided group or the conventional-experience group. Randomization will be stratified by Lenke classification.
In the model-guided group, preoperative clinical and radiographic variables will be entered into the locked machine learning model. The model will generate a predicted risk of distal adding-on and a recommendation for lowest instrumented vertebra selection. For Lenke type 1 patients, the decision will focus on selection between one level proximal to the last substantially touching vertebra and the last substantially touching vertebra. For Lenke type 5 patients, the decision will focus on selection between L3 and L4. The surgeon will make the final decision after considering the model output and clinical judgment.
In the conventional-experience group, the surgeon will select the lowest instrumented vertebra based on routine clinical experience and existing surgical principles. The model output will not be provided to the surgeon for participants in this group.
Both groups will undergo standard posterior spinal fusion with an all-pedicle screw instrumentation system. Postoperative follow-up will be performed at 1 week and at 3, 6, 12, and 24 months after surgery. The primary outcome is the incidence of distal adding-on at 24 months after surgery. Secondary outcomes include number of fused segments, Cobb angle correction rate, coronal balance, sagittal radiographic parameters, Scoliosis Research Society-22 score, visual analog scale score for low back pain, complications, instrumentation failure, revision surgery, and adoption of model recommendations.
The primary outcome will be assessed by independent radiographic reviewers who are blinded to treatment allocation.
Tipo de estudo
Tipo de estudo
Inscrição (Estimado)
Inscrição
Estágio
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
Contato de estudo
- Nome: Xiaodong Qin, MD, PhD
- Número de telefone: 025-68182923
- E-mail: gyethics@163.com
Locais de estudo
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Jiangsu
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Nanjing, Jiangsu, China, 210008
- Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School
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Contato:
- Xiaodong Qin, MD, PhD
- Número de telefone: 025-68182923
- E-mail: gyethics@163.com
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Critérios de participação
Critérios de elegibilidade
Critérios de elegibilidade
Idades elegíveis para estudo
- Filho
- Adulto
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- Diagnosis of adolescent idiopathic scoliosis classified as Lenke type 1A or Lenke type 5C.
- Age 10 to 18 years, inclusive.
- Scheduled to undergo posterior spinal fusion using an all-pedicle screw instrumentation system.
- Planned selective thoracic fusion or selective lumbar fusion, with a clinical need for lowest instrumented vertebra decision-making.
- Availability of required preoperative standing full-spine radiographs and bending radiographs.
- Ability and willingness to complete the planned 24-month postoperative follow-up.
- Written informed consent provided by the participant and legal guardian.
Exclusion Criteria:
- - Congenital scoliosis, neuromuscular scoliosis, syndromic scoliosis, or other non-idiopathic scoliosis.
- History of spinal trauma, spinal tumor, spinal tuberculosis, or spinal infection.
- Previous spinal surgery.
- Severe sagittal spinal deformity, such as Scheuermann disease, for which the study model is not applicable.
- Neurological symptoms or signs.
- Leg length discrepancy greater than 10 mm.
- The surgeon determines that there is no clinical equipoise for lowest instrumented vertebra selection because one option is clearly contraindicated for safety or anatomical reasons.
- Inability to complete follow-up or required study assessments.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Solteiro
Número de braços
Armas e Intervenções
Grupo de Participantes / BraçoGrupo de Participantes / Braço |
Intervenção / TratamentoIntervenção / Tratamento |
|---|---|
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Experimental: Model-Guided Group
Participants in this group will undergo standard posterior spinal fusion.
Before surgery, preoperative clinical and radiographic variables will be entered into the locked Drum Tower Rule machine learning model.
The model will generate a predicted risk of distal adding-on and a recommendation for lowest instrumented vertebra selection.
The surgeon will make the final decision after considering the model output and clinical judgment.
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A locked machine learning-based decision support model will be used before surgery to estimate the risk of postoperative distal adding-on and provide a recommendation for lowest instrumented vertebra selection.
The model output will be available to surgeons in the model-guided group only.
All participants will undergo standard posterior spinal fusion using an all-pedicle screw instrumentation system.
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Comparador Ativo: Conventional-Experience Group
Participants in this group will undergo standard posterior spinal fusion.
The surgeon will select the lowest instrumented vertebra according to routine clinical experience and existing surgical principles.
The Drum Tower Rule model output will not be provided to the surgeon for participants in this group.
|
All participants will undergo standard posterior spinal fusion using an all-pedicle screw instrumentation system.
The lowest instrumented vertebra will be selected by the surgeon according to routine clinical experience and existing surgical principles, without access to the Drum Tower Rule model output.
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O que o estudo está medindo?
Medidas de resultados primários
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Incidence of Distal Adding-on
Prazo: 24 months after surgery
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Distal adding-on is defined as an increase of more than 5 degrees in the disc angle below the lowest instrumented vertebra compared with the immediate postoperative radiograph, or an increase of more than 5 mm in the translation of the vertebra below the lowest instrumented vertebra relative to the central sacral vertical line.
The outcome will be assessed by blinded radiographic reviewers.
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24 months after surgery
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Medidas de resultados secundários
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Scoliosis Research Society-22 Score
Prazo: 24 months after surgery
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Health-related quality of life will be assessed using the Scoliosis Research Society-22 questionnaire.
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24 months after surgery
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Outras medidas de resultado
Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Incidence of Surgery-Related Complications
Prazo: From surgery to 24 months after surgery
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Surgery-related complications include perioperative complications, instrumentation failure, proximal junctional kyphosis, adjacent segment degeneration, pseudarthrosis, infection, and revision surgery.
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From surgery to 24 months after surgery
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Publicações e links úteis
Publicações Gerais
- Weinstein SL, Dolan LA, Cheng JC, Danielsson A, Morcuende JA. Adolescent idiopathic scoliosis. Lancet. 2008 May 3;371(9623):1527-37. doi: 10.1016/S0140-6736(08)60658-3.
- Lenke LG, Betz RR, Harms J, Bridwell KH, Clements DH, Lowe TG, Blanke K. Adolescent idiopathic scoliosis: a new classification to determine extent of spinal arthrodesis. J Bone Joint Surg Am. 2001 Aug;83(8):1169-81.
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Início do estudo
Conclusão Primária (Estimado)
Conclusão Primária
Conclusão do estudo (Estimado)
Conclusão do estudo
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Primeira postagem
Atualizações de registro de estudo
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Última Atualização Postada
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Última verificação
Mais Informações
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Outros números de identificação do estudo
- NDTH-20260578
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