[Measuring spondyloarthritis]

The ASAS group recommendations as well as those from the SER consensus for the treatment of spondyloarthritis with TNF inhibitors advise for the performance of spinal motility tests among the response to treatment measures. The clinical variability between rheumatologists when performing these types of measurements is well documented. Recently, the GRESSER group in our country has created a school to improve knowledge in the area of spondyloarthritis among rheumatologists. One of their objectives is the standardization in the ways measurements are performed in this group of diseases. This document summarizes the activities developed in a recent workshop with a detailed description of the procedures followed to perform each one of the important measurements affecting the axial skeleton. With this we hope to contribute to the much desired standardization in the field of metrology in spondyloarthritis.