Intrarater and Interrater Reliability of the Flexicurve Index, Flexicurve Angle, and Manual Inclinometer for the Measurement of Thoracic Kyphosis
Figure 2
The flexicurve kyphosis index and angle are computed using measurements taken from the flexicurve tracing, represented here by the curve from C7 to T12. To calculate the flexicurve kyphosis index, the apex kyphosis height (B) is divided by the length of the entire thoracic curve () and then multiplied by 100 (). The flexicurve angle or theta (θ) is calculated using lines drawn perpendicular to the short sides of the triangle inscribed by the thoracic curve. Theta equals arc tan () + arc tan () [23].
