A study by Teixeira and Carvalho (2007) assessed the reliability and validity of thoracic kyphosis measurements using the flexicurve method. A cross-sectional study analyzed the thoracic kyphosis of 56 people from sagittal radiography of the thoracic column using Cobb's method and by means of the flexicurve method, by two evaluators. Results indicated he intra-class correlation coefficient (ICC) between the measurements from the Cobb and flexicurve methods was 0.906 (Teixeira & Carvalho, 2007). For diagnosing thoracic hyperkyphosis, the sensitivity was 85% and the specificity was 97% (Teixeira & Carvalho, 2007). In conclusion, the flexicurve method was shown to be a suitable quantitative clinical method for measuring the curvature of thoracic kyphosis (Teixeira & Carvalho, 2007).