Accuracy, Reliability, and Validity of a 3-Dimensional Scanner for Assessing Torso Shape in Idiopathic Scoliosis
Accuracy, Reliability, and Validity of a 3-Dimensional Scanner for Assessing Torso Shape in Idiopathic Scoliosis
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DOI：
10.1097/brs.0b013e31823a012e
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发表时间：
2012-05-15
期刊：
影响因子：
3
通讯作者：
Masso, Peter D.
中科院分区：
文献类型：
--
作者：
Gorton, George E., III;Young, Megan L.;Masso, Peter D.
研究设计.具有并行对照的前瞻性队列。确定Vitronic 3D身体扫描仪评估特发性脊柱侧凸患者躯干不对称的准确性、可靠性和有效性。改善外观是脊柱侧凸患者及其父母对治疗的重要期望。尽管Cobb角是量化结果的“金标准”，但它不能解释外观或生活质量的感知。表面形貌是一种有吸引力的非侵入性替代放射摄影，但尚未在以患者为中心的结果的背景下进行研究。36例接受手术矫正的特发性脊柱侧凸青少年接受了术前和术后X线片检查，并对站立姿势、躯干表面形状以及脊柱侧凸研究协会-22和脊柱外观问卷的回答进行了评价。21名无脊柱侧凸的青少年进行了评估比较。通过扫描已知尺寸的物体来评估扫描仪的准确性。从扫描数据构建的身体形状措施的会话内的可靠性进行了评估。通过检查术前术后差异来评估判别效度。通过扫描测量与X光片、姿势光电测量的相关性以及对脊柱侧凸研究协会-22和脊柱外观量表的自我报告反应来检查并行有效性。扫描系统测量误差为1.74 +/- 1.56 mm。对照组（组内相关系数= 0.83）和脊柱侧凸组（组内相关系数= 0.94）的会话内可靠性极佳。术前、术后和对照组的躯干内侧/外侧移位、旋转和左右不对称性差异显著（方差分析，P < 0.05）。躯干不对称测量与X线片测量（r = 0.43-0.51）、姿势和对称性光电测量（r = 0.33-0.75）、脊柱侧凸研究协会-22（r = 0.35-0.64）的外观和生活质量领域以及脊柱外观问卷（r = 0.48-0.67）相关。Vitronic 3D身体扫描仪具有足够的准确性、可靠性和有效性，可用于监测脊柱侧凸引起的躯干不对称。基于扫描的测量区分正常和病理，术前和术后的身体形状，并显示出良好的相关性与外观和生活质量的措施。
Study Design. Prospective cohort with concurrent controls.Objective. To establish accuracy, reliability, and validity of the Vitronic 3D Body Scanner for the evaluation of torso asymmetry in patients with idiopathic scoliosis.Summary of Background Data. Improved appearance is an important expectation of treatment for patients with scoliosis and their parents. Despite being the "gold standard" for quantifying outcomes, Cobb angles do not explain perception of appearance or quality of life. Surface topography is an attractive noninvasive alternative to radiography but has not been studied in the context of patient-centered outcomes.Methods. Thirty-six adolescents with idiopathic scoliosis undergoing surgical correction had pre- and postoperative radiographs and evaluation of standing posture, torso surface shape, and responses to the Scoliosis Research Society-22 and Spinal Appearance Questionnaire. Twenty-one adolescents without scoliosis were evaluated for comparison. Scanner accuracy was assessed by scanning an object of known dimensions. Within-session reliability of body shape measures constructed from scan data was assessed. Discriminant validity was assessed by examining pre- to postoperative differences. Concurrent validity was examined through correlations of scan measures with radiographs, optoelectronic measures of posture, and self-report responses to the Scoliosis Research Society-22 and Spinal Appearance Questionnaire.Results. Scan system measurement error was 1.74 +/- 1.56 mm. Within-session reliability was excellent for the control (intraclass correlation coefficient = 0.83) and scoliosis (intraclass correlation coefficient = 0.94) groups. Medial/lateral torso shift, rotation, and right/left asymmetry differed significantly among the preoperative, postoperative, and control groups (analysis of variance, P < 0.05). Torso asymmetry measures correlated with radiographical measures (r = 0.43-0.51), optoelectronical measures of posture and symmetry (r = 0.33-0.75), and appearance and quality-of-life domains of the Scoliosis Research Society-22 (r = 0.35-0.64) and the Spinal Appearance Questionnaire (r = 0.48-0.67).Conclusion. The Vitronic 3D Body Scanner has sufficient accuracy, reliability, and validity to monitor torso asymmetry due to scoliosis. Scan-based measures differentiate between normal and pathological and between preoperative and postoperative body shape and show good correlation with measures of appearance and quality of life.