RT Journal Article SR Electronic T1 High Reproducibility of an Automated Measurement of Mobility for Patients with Axial Spondyloarthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1383 OP 1388 DO 10.3899/jrheum.170941 VO 45 IS 10 A1 Juan L. Garrido-Castro A1 Rafael Curbelo A1 Ramón Mazzucchelli A1 María E. Domínguez-González A1 Cristina Gonzalez-Navas A1 Bryan J. Flores Robles A1 Pedro Zarco A1 Juan Mulero A1 Luis Cea-Calvo A1 María J. Arteaga A1 Pilar Font-Ugalde A1 Loreto Carmona A1 Eduardo Collantes-Estevez YR 2018 UL http://www.jrheum.org/content/45/10/1383.abstract AB Objective. Conventional measures of spinal mobility used in the assessment of patients with axial spondyloarthritis (axSpA), such as the Bath Ankylosing Spondylitis Metrology Index and its components, are subject to interobserver variability. The University of Córdoba Ankylosing Spondylitis Metrology Index (UCOASMI) is a validated composite index based on a motion video-capture system, UCOTrack. Our objective was to assess its reproducibility in clinical practice settings.Methods. We carried out an observational study of repeated measures in 3 centers. Video-capture systems were installed and adapted to clinical rooms. Patients with axSpA and stable disease were selected by consecutive stratified sampling [disease duration, sex, and the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)]. Intraobserver reliability of the UCOASMI and of conventional measures was tested 3–5 days apart. For interobserver reliability, 3 patients from each center were evaluated in the other centers, within 3–7 days. The intraclass correlation coefficients (ICC) were calculated.Results. Thirty patients were included (73% men, mean age 53 yrs, mean BASDAI 3.0). Interobserver and intraobserver ICC of the UCOASMI was 0.98. Conventional measurements showed lower but adequate reproducibility as well, except for interobserver reliability of lateral flexion (0.41), cervical rotation (0.61), and Schöber test (0.07), and intraobserver reliability of tragus-to-wall distance (0.30).Conclusion. Reproducibility of the UCOASMI seems very high, and apparently more reliable than conventional measures of mobility.