Advanced search
1 file | 577.92 KB

Posture class prediction of pre-peak height velocity subjects according to gross body segment orientations using linear discriminant analysis

Mieke Dolphens (UGent) , Barbara Cagnie (UGent) , Pascal Coorevits (UGent) , Adriaan Vleeming (UGent) , Tanneke Palmans (UGent) and Lieven Danneels (UGent)
(2014) EUROPEAN SPINE JOURNAL. 23(3). p.530-535
Author
Organization
Abstract
Measurement and classification of standing posture in the sagittal plane has important clinical implications for adolescent spinal disorders. Previous work using cluster analysis on three gross body segment orientation parameters (lower limbs, trunk, and entire body inclination) has identified three distinct postural groups of healthy subjects before pubertal peak growth: "neutral", "sway-back", and "leaning-forward". Although accurate postural subgrouping may be proposed to be crucial in understanding biomechanical challenges posed by usual standing, there is currently no objective method available for class assignment. Hence, this paper introduces a novel approach to subclassify new cases objectively according to their overall sagittal balance. Postural data previously acquired from 1,196 pre-peak height velocity (pre-PHV) subjects were used in this study. To derive a classification rule for assigning a class label ("neutral", "sway-back", or "leaning-forward") to any new pre-PHV subjects, linear discriminant analysis was applied. Predictor variables were pelvic displacement, trunk lean and body lean angle. The performance of the newly developed classification algorithm was verified by adopting a cross-validation procedure. The statistical model correctly classified over 96.2 % of original grouped subjects. In the cross-validation procedure used, over 95.9 % of subjects were correctly assigned. Based on three angular measures describing gross body segment orientation, our triage method is capable of reliably classifying pre-PHV subjects as either "neutral", "sway-back", or "leaning-forward". The discriminant prediction equations presented here enable a highly accurate posture class allocation of new cases with a prediction capability higher than 95.9 %, thereby removing subjectivity from sagittal plane posture classification.
Keywords
Sagittal balance, Classification, Posture type prediction, Linear discriminant analysis, Young adolescence, LOW-BACK-PAIN, PELVIC ALIGNMENT, SPINAL POSTURE, CLASSIFICATION, CHILDREN, COHORT

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 577.92 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Dolphens, Mieke, Barbara Cagnie, Pascal Coorevits, Adriaan Vleeming, Tanneke Palmans, and Lieven Danneels. 2014. “Posture Class Prediction of Pre-peak Height Velocity Subjects According to Gross Body Segment Orientations Using Linear Discriminant Analysis.” European Spine Journal 23 (3): 530–535.
APA
Dolphens, M., Cagnie, B., Coorevits, P., Vleeming, A., Palmans, T., & Danneels, L. (2014). Posture class prediction of pre-peak height velocity subjects according to gross body segment orientations using linear discriminant analysis. EUROPEAN SPINE JOURNAL, 23(3), 530–535.
Vancouver
1.
Dolphens M, Cagnie B, Coorevits P, Vleeming A, Palmans T, Danneels L. Posture class prediction of pre-peak height velocity subjects according to gross body segment orientations using linear discriminant analysis. EUROPEAN SPINE JOURNAL. 2014;23(3):530–5.
MLA
Dolphens, Mieke, Barbara Cagnie, Pascal Coorevits, et al. “Posture Class Prediction of Pre-peak Height Velocity Subjects According to Gross Body Segment Orientations Using Linear Discriminant Analysis.” EUROPEAN SPINE JOURNAL 23.3 (2014): 530–535. Print.
@article{4145984,
  abstract     = {Measurement and classification of standing posture in the sagittal plane has important clinical implications for adolescent spinal disorders. Previous work using cluster analysis on three gross body segment orientation parameters (lower limbs, trunk, and entire body inclination) has identified three distinct postural groups of healthy subjects before pubertal peak growth: {\textacutedbl}neutral{\textacutedbl}, {\textacutedbl}sway-back{\textacutedbl}, and {\textacutedbl}leaning-forward{\textacutedbl}. Although accurate postural subgrouping may be proposed to be crucial in understanding biomechanical challenges posed by usual standing, there is currently no objective method available for class assignment. Hence, this paper introduces a novel approach to subclassify new cases objectively according to their overall sagittal balance. 
Postural data previously acquired from 1,196 pre-peak height velocity (pre-PHV) subjects were used in this study. To derive a classification rule for assigning a class label ({\textacutedbl}neutral{\textacutedbl}, {\textacutedbl}sway-back{\textacutedbl}, or {\textacutedbl}leaning-forward{\textacutedbl}) to any new pre-PHV subjects, linear discriminant analysis was applied. Predictor variables were pelvic displacement, trunk lean and body lean angle. The performance of the newly developed classification algorithm was verified by adopting a cross-validation procedure. 
The statistical model correctly classified over 96.2 \% of original grouped subjects. In the cross-validation procedure used, over 95.9 \% of subjects were correctly assigned. 
Based on three angular measures describing gross body segment orientation, our triage method is capable of reliably classifying pre-PHV subjects as either {\textacutedbl}neutral{\textacutedbl}, {\textacutedbl}sway-back{\textacutedbl}, or {\textacutedbl}leaning-forward{\textacutedbl}. The discriminant prediction equations presented here enable a highly accurate posture class allocation of new cases with a prediction capability higher than 95.9 \%, thereby removing subjectivity from sagittal plane posture classification.},
  author       = {Dolphens, Mieke and Cagnie, Barbara and Coorevits, Pascal and Vleeming, Adriaan and Palmans, Tanneke and Danneels, Lieven},
  issn         = {0940-6719},
  journal      = {EUROPEAN SPINE JOURNAL},
  language     = {eng},
  number       = {3},
  pages        = {530--535},
  title        = {Posture class prediction of pre-peak height velocity subjects according to gross body segment orientations using linear discriminant analysis},
  url          = {http://dx.doi.org/10.1007/s00586-013-3058-0},
  volume       = {23},
  year         = {2014},
}

Altmetric
View in Altmetric
Web of Science
Times cited: