Erin Hannink1,2,3, Helen Dawes4,5,6, Thomas M L Shannon7, Karen L Barker8,9. 1. Physiotherapy Research Unit, Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK. erin.hannink@ouh.nhs.uk. 2. Centre for Movement, Occupational and Rehabilitation Sciences, Oxford Brookes University, Oxford, UK. erin.hannink@ouh.nhs.uk. 3. Nuffield Department of Orthopaedic, Rheumatoid and Musculoskeletal Sciences, University of Oxford, Oxford, UK. erin.hannink@ouh.nhs.uk. 4. Centre for Movement, Occupational and Rehabilitation Sciences, Oxford Brookes University, Oxford, UK. 5. College of Medicine and Health, University of Exeter, Exeter, UK. 6. Oxford Health, Biomedical Research Centre, University of Oxford, Oxford, UK. 7. Centre for Biomechanics and Rehabilitation Technologies, Staffordshire University, Stoke-on-Trent, UK. 8. Physiotherapy Research Unit, Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK. 9. Nuffield Department of Orthopaedic, Rheumatoid and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
Abstract
PURPOSE: To estimate the criterion validity of sagittal thoracolumbar spine measurement using a surface topography method in a clinical population against the gold standard and to estimate concurrent validity against two non-radiographic clinical tools. METHODS: In this cross-sectional validity study, thoracolumbar curvature was measured in adults with spinal conditions recruited from a specialist orthopaedic hospital. A surface topography method using a Kinect sensor was compared to three other measurement methods: spinal radiograph (gold standard), flexicurve and digital inclinometer. Correlation coefficients and agreement between the measurement tools were analysed. RESULTS: Twenty-nine participants (79% female) were included in criterion validity analyses and 38 (76% female) in concurrent validity analyses. The surface topography method was moderately correlated with the radiograph (r = .70, p < .001) in the thoracic spine, yet there was no significant correlation with the radiograph in the lumbar spine (r = .32, p = .89). The surface topography method was highly correlated with the flexicurve (rs = .91, p < .001) and digital inclinometer (r = .82, p < .001) in the thoracic spine, and highly correlated with the flexicurve (r = .74, p < .001) and digital inclinometer (r = .74, p < .001) in the lumbar spine. CONCLUSIONS: The surface topography method showed moderate correlation and agreement in thoracic spine with the radiograph (criterion validity) and high correlation with the flexicurve and digital inclinometer (concurrent validity). Compared with other non-radiographic tools, this surface topography method displayed similar criterion validity for kyphosis curvature measurement.
PURPOSE: To estimate the criterion validity of sagittal thoracolumbar spine measurement using a surface topography method in a clinical population against the gold standard and to estimate concurrent validity against two non-radiographic clinical tools. METHODS: In this cross-sectional validity study, thoracolumbar curvature was measured in adults with spinal conditions recruited from a specialist orthopaedic hospital. A surface topography method using a Kinect sensor was compared to three other measurement methods: spinal radiograph (gold standard), flexicurve and digital inclinometer. Correlation coefficients and agreement between the measurement tools were analysed. RESULTS: Twenty-nine participants (79% female) were included in criterion validity analyses and 38 (76% female) in concurrent validity analyses. The surface topography method was moderately correlated with the radiograph (r = .70, p < .001) in the thoracic spine, yet there was no significant correlation with the radiograph in the lumbar spine (r = .32, p = .89). The surface topography method was highly correlated with the flexicurve (rs = .91, p < .001) and digital inclinometer (r = .82, p < .001) in the thoracic spine, and highly correlated with the flexicurve (r = .74, p < .001) and digital inclinometer (r = .74, p < .001) in the lumbar spine. CONCLUSIONS: The surface topography method showed moderate correlation and agreement in thoracic spine with the radiograph (criterion validity) and high correlation with the flexicurve and digital inclinometer (concurrent validity). Compared with other non-radiographic tools, this surface topography method displayed similar criterion validity for kyphosis curvature measurement.
Authors: Deborah M Kado; Mei-Hua Huang; Arun S Karlamangla; Peggy Cawthon; Wendy Katzman; Teresa A Hillier; Kristine Ensrud; Steven R Cummings Journal: J Bone Miner Res Date: 2013-01 Impact factor: 6.741