The margin of stability is bigger in girls with Lenke I adolescent idiopathic scoliosis: A case-control study

IF 1.4 3区医学 Q4 ENGINEERING, BIOMEDICAL

Clinical Biomechanics Pub Date : 2025-09-24 DOI:10.1016/j.clinbiomech.2025.106674

Fraje Watson , Rui V. Loureiro , Julian J.H. Leong

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引用次数: 0

Abstract

Background

The Margin of Stability is used to measure stability in adults with pathologic gait including spinal deformity. The aim was to compare anterior-posterior and mediolateral Margin of Stability in girls with Adolescent Idiopathic Scoliosis to typically-developing girls, and to test the effect of speed and Cobb angle on the Margin of Stability.

Methods

Eight girls with Lenke 1 Adolescent Idiopathic Scoliosis (Cobb: 53.9±15.2°) were recruited from the Royal National Orthopaedic Hospital between July 2021 and August 2022, and seven propensity-matched typically-developing girls were recruited. Participants walked at three speeds on an instrumented treadmill wearing a full-body plug-in-gait marker set. Mean Margin of Stability at heel strike during 30-seconds of walking was calculated. The Margin of Stability was compared between girls with Adolescent Idiopathic Scoliosis and controls using a Two-way ANOVA with paired analysis and was correlated to Cobb angle in girls with Adolescent Idiopathic Scoliosis using Pearson’s r².

Findings

There was weak evidence for a Group-Speed interaction between for anterior-posterior Margin of Stability at 1.2 m/s. It was higher in Cases than at 1.2 m/s compared to Controls (left: p = 0.05; right: p = 0.06). Anterior-posterior Margin of Stability was not significantly correlated with Cobb angle. Mediolateral Margin of Stability did not differ between Group or Group-Speed interaction but was negatively correlated with increasing Cobb angle (left: p = 0.002; right: p = 0.04).

Interpretation

Girls with moderate-severe Lenke I Adolescent Idiopathic Scoliosis were more anterior-posteriorly stable than Controls at higher speeds. Gait challenges may require compensatory mechanisms for perceived instability caused by their spinal deformity.

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在Lenke I型青少年特发性脊柱侧凸的女孩中，稳定性的边缘更大：一项病例对照研究。

背景：稳定边缘用于测量成人病理性步态的稳定性，包括脊柱畸形。目的是比较青春期特发性脊柱侧凸女孩与正常发育女孩的前后和中外侧稳定缘，并测试速度和Cobb角对稳定缘的影响。方法：于2021年7月至2022年8月在英国皇家国立骨科医院招募8名患有Lenke 1型青少年特发性脊柱侧凸（Cobb: 53.9±15.2°）的女孩，其中7名倾向匹配的典型发育女孩。参与者穿着全身插入式步态标记装置，在仪器跑步机上以三种速度行走。计算行走30秒时脚跟撞击的平均稳定余量。使用配对分析的双向方差分析比较青春期特发性脊柱侧凸女孩和对照组的稳定边缘，并使用Pearson's r2与青春期特发性脊柱侧凸女孩的Cobb角相关。结果：在1.2 m/s时，前后稳定边缘之间存在微弱的群速度相互作用。与对照组相比，病例组的速度高于1.2 m/s（左：p = 0.05；右：p = 0.06）。前后稳定缘与Cobb角无显著相关。中外侧稳定缘在组与组速交互作用中无差异，但与Cobb角的增加呈负相关（左：p = 0.002；右：p = 0.04）。解释：中重度Lenke I型青少年特发性脊柱侧凸的女孩在较高的速度下比对照组更前后稳定。步态挑战可能需要代偿机制来解决脊柱畸形引起的不稳定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clinical Biomechanics 医学-工程：生物医学

CiteScore

3.30

自引率

5.60%

发文量

189

审稿时长

12.3 weeks

期刊介绍： Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field. The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management. A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly. Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians. The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time. Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.