Affiliations: Department of Physiotherapy, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
Correspondence:
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Corresponding author: Gisela Rocha de Siqueira. Department of Physiotherapy, Universidade Federal de Pernambuco Av. Jornalista Aníbal Fernandes 173, Cidade Universitaária, Recife 50.740-560, Pernambuco, Brazil. E-mail: [email protected].
Abstract: BACKGROUND: Accuracy studies of biophotogrammetry protocols require standardization similar to radiography. OBJECTIVE: To estimate the diagnostic accuracy of a biophotogrammetric assessment protocol for cervical hyperlordosis, compared to radiography, and its intra- and inter-examiner reliability for measuring the cervical lordosis angle. METHODS: A study of diagnostic accuracy in women complaining of cervical pain. Two photos were taken using the CorelDraw biophotogrammetric protocol and one radiograph using the Cobb C1-C7 method. The Intra- and Inter-examiner reliability was calculated using the Kappa index and the intraclass correlation coefficient (ICC). The Bland-Altman plot and the ROC curve were presented. RESULTS: The sample consisted of 19 women. The accuracy of biophotogrammetry was 94.73% and the reliability between biophotogrammetry and radiography presented an ICC of 0.84 and a Kappa of 0.87. The excellent intra (ICC = 0.94) and inter-examiner (ICC = 0.86) reliability of the biophotogrammetry was confirmed. The area under the ROC curve was 93.5%. The Bland-Altman plot indicated differences between the two instruments close to the mean (1.5∘). CONCLUSION: The biophotogrammetric protocol proved to be accurate in diagnosing cervical hyperlordosis, with excellent reliability between the biophotogrammetric and radiographic assessments. It also demonstrated excellent intra- and inter-examiner reliability in measuring the cervical lordosis angle.
Keywords: Cervical vertebrae, data accuracy, posture, photogrammetry, radiography
