title: Spine curvature analysis between participants with obesity and normal weight participants: a biplanar electromagnetic device measurement.
abstract: To analyse and compare standing thoracolumbar curves in normal weight participants and participants with obesity, using an electromagnetic device, and to analyse the measurement reliability.
  
  
  METHODS
  Cross-sectional study was carried out. 36 individuals were divided into two groups (normal-weight and participants with obesity) according to their waist circumference. The reference points (T1-T8-L1-L5 and both posterior superior iliac spines) were used to perform a description of thoracolumbar curvature in the sagittal and coronal planes. A transformation from the global coordinate system was performed and thoracolumbar curves were adjusted by fifth-order polynomial equations. The tangents of the first and fifth lumbar vertebrae and the first thoracic vertebra were determined from their derivatives. The reliability of the measurement was assessed according to the internal consistency of the measure and the thoracolumbar curvature angles were compared between groups.
  
  
  RESULTS
  Cronbach's alpha values ranged between 0.824 (95% CI: 0.776-0.847) and 0.918 (95% CI: 0.903-0.949). In the coronal plane, no significant differences were found between groups; however, in sagittal plane, significant differences were observed for thoracic kyphosis.
  
  
  CONCLUSIONS
  There were significant differences in thoracic kyphosis in the sagittal plane between two groups of young adults grouped according to their waist circumference.
authors.affiliation: Department of Physiotherapy, Faculty of Health Sciences, University of Malaga, 29071 Málaga, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: González-Sánchez
authors.affiliation: Department of Life Sciences, Roehampton University, London SW15 4JD, UK.
authors.forename: Jin
authors.identifier: 0000-0001-5451-9535
authors.initials: J
authors.lastname: Luo
authors.affiliation: Department of Life Sciences, Roehampton University, London SW15 4JD, UK.
authors.forename: Raymond
authors.identifier: 0000-0003-3580-5661
authors.initials: R
authors.lastname: Lee
authors.affiliation: Department of Physiotherapy, Faculty of Health Sciences, University of Malaga, 29071 Málaga, Spain ; School of Clinical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD 4059, Australia.
authors.forename: Antonio I
authors.initials: AI
authors.lastname: Cuesta-Vargas
mesh_terms: D000328:Adult; D001835:Body Weight; D055590:Electromagnetic Phenomena; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000503:physiopathology; D008297:Male; D009765:Obesity / Q000503:physiopathology*; D009983:Orthopedic Equipment; D015203:Reproducibility of Results; D013131:Spine / Q000503:physiopathology*; D013904:Thoracic Vertebrae / Q000503:physiopathology