title: Validation of a novel spinal posture monitor: comparison with digital videofluoroscopy.
abstract: OBJECTIVE
  A novel, minimally invasive posture monitor which can monitor lumbar postures outside the laboratory has demonstrated excellent reliability, as well as concurrent validity compared to a surface marker-based motion analysis system. However, it is unclear if this device reflects underlying vertebral motion.
  
  
  METHODS
  Twelve participants performed full range sagittal plane lumbo-pelvic movements during sitting and standing. Their posture was measured simultaneously using both this device (BodyGuard™) and digital videofluoroscopy.
  
  
  RESULTS
  Strong correlations were observed between the two methods (all r (s) > 0.88). Similarly, the coefficients of determination were high (all r (2) > 0.78). The maximum mean difference between the measures was located in the mid-range of motion and was approximately 3.4° in sitting and 3.9° in standing.
  
  
  CONCLUSIONS
  The BodyGuard™ appears to be a valid method for analysing vertebral motion in the sagittal plane and is a promising tool for long-term monitoring of spinal postures in laboratory and clinical settings in people with low back pain.
authors: Physiotherapy Department, University of Limerick, Limerick, Ireland. kieran.osullivan@ul.ie
authors: Kieran
authors: K
authors: O'Sullivan
authors: Sabine
authors: S
authors: Verschueren
authors: Steven
authors: S
authors: Pans
authors: David
authors: D
authors: Smets
authors: Karel
authors: K
authors: Dekelver
authors: Wim
authors: W
authors: Dankaerts
mesh_terms: D005471:Fluoroscopy; D006801:Humans; D017116:Low Back Pain / Q000175:diagnosis / Q000503:physiopathology; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D011187:Posture / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D013131:Spine / Q000502:physiology*; D014741:Video Recording