Snow JC, Simpson K, Rahman P, et al. - The present study was performed to investigate criterion-concurrent validity for a clinically feasible measurement method of measuring spine mobility using tri-axial accelerometers. Researchers recruited a total of 15 radiographic-Spondyloarthritis patients for this study. Pearson’s correlation coefficients were used to compare the criterion-concurrent validity of all measurement methods with the radiographic measures. They performed a Bland-Altman analysis to evaluate the agreement. It was shown that accelerometer measures indicated superior criterion-concurrent validity compared to current tape measures of spinal mobility in forwarding bending. The Lateral Spinal Flexion Test and Domjan Test were found to have the best criterion-concurrent validity of all tests examined in this study, while a moderate correlation exists between accelerometer and radiographs in lateral bending.