Validation of the Measurement of the Angle of Trunk Rotation in Photogrammetry |
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| Institution: | 1. Department of Physical Therapy, Speech and Occupational Therapy, School of Medicine, University of São Paulo, São Paulo, Brazil;2. Department of Physical Therapy, Pontifícia Universidade Católica de São Paulo, São Paulo, Brazil;3. Rehabilitation and Functional Development Program, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil;4. Department of Post-Graduation of Health Sciences, University of Santo Amaro, São Paulo, Brazil;5. School of Odontology, University of São Paulo, São Paulo, Brazil;1. Postgraduate Program of Rehabilitation Sciences, UNISUAM, Rio de Janeiro, Brazil;2. Molecular Carcinogenesis Program, National Cancer Institute, Rio de Janeiro, Brazil;3. PROCC, FIOCRUZ, Rio de Janeiro, Brazil;4. Centro Universitário Celso Lisboa, Rio de Janeiro, Brazil;5. Instituto D''Or de Pesquisa e Ensino, Rio de Janeiro, Brazil. |
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| Abstract: | ObjectiveThe purpose of this study was to validate the photogrammetric measurement of the angle of trunk rotation in relation to the scoliometer instrument.MethodsFifty-eight prominences from individuals with ages between 7 and 18 and with suspicion of spinal asymmetry (SA) were evaluated through the scoliometer and photogrammetry. The photographs were analyzed in the Digital Image-based Postural Assessment software. For statistical purposes, we used Pearson’s correlation test (r), root mean square error, Bland-Altman graphical analysis, and receiver operating characteristic curve. The level of significance was P ≤ .05.ResultsExcellent correlation for the angle of trunk rotation was obtained between the scoliometer and photogrammetry, with a root mean square error of 3°. The Bland-Altman graphical analysis showed equally dispersed data with no participants outside the limits of agreement. The receiver operating characteristic curve evidenced that (1) the cutoff point for the identification of the presence of spinal asymmetry is 4°; (2) mild to moderate SA is between 4° and 7°; (3) moderate to severe SA is above 8°; and (4) sensitivity and specificity were above 83% and 78%, respectively, with an area under the curve ≥ 90%.ConclusionPhotogrammetry is validated for measuring the angle of trunk rotation, being an accurate and accessible tool for the evaluation of patients with spinal asymmetries. |
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