title: Reliability and validity of a kinematic spine model during active trunk movement in healthy subjects and patients with chronic non-specific low back pain.
abstract: OBJECTIVE
  To develop a standardized, reliable, valid spine model of active trunk movements that accurately discriminates kinematic patterns of patients with chronic non-specific low back pain from those of healthy subjects.
  
  
  METHODS
  Comparative cohort study.
  
  
  METHODS
  Healthy subjects (n = 25) and patients with chronic non-specific low back pain (n = 25) aged 30-65 years.
  
  
  METHODS
  Subjects performed 7 trunk movements from a seated position at non-imposed speed during 2 sessions. Nine markers on bony landmarks measured range of motion and speed of 5 spinal segments, recorded by 8 optoelectronic cameras.
  
  
  RESULTS
  Both groups showed good-excellent reliability in all movements for range of motion and speed of all spinal segments (intraclass correlation (ICC), 0.70-0.96; standard error of measurement, expressed as a percentage, 19.4-3.3%). The minimal detectable change in the patient group was 16.7-53.7%. Range of motion and speed in all spinal segments for trunk flexion, rotation, and flexion with rotation differed significantly between groups (p < 0.001), with large/very large effect sizes (Cohen's d = 1.2-2). Binary logistic regression yielded sensitivities/specificities of 92%/84% for range of motion and 92%/80% for speed.
  
  
  CONCLUSIONS
  Kinematic variables are valid, reliable measures and can be used clinically to diagnose chronic non-specific low back pain, manage treatment, and as quantitative outcome measures for clinical trial interventions.
authors: Institute of Neuroscience, University of Louvain, Brussels, Belgium. benjamin.hidalgo@uclouvain.be
authors: Benjamin
authors: B
authors: Hidalgo
authors: Maxime
authors: M
authors: Gilliaux
authors: William
authors: W
authors: Poncin
authors: Christine
authors: C
authors: Detrembleur
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D009068:Movement / Q000502:physiology; D015203:Reproducibility of Results