Validity and reliability of a sensor-based electronic spinal mobility index for axial spondyloarthritis
- 28 April 2020
- journal article
- research article
- Published by Oxford University Press (OUP) in Rheumatology
- Vol. 59 (11), 3415-3423
- https://doi.org/10.1093/rheumatology/keaa122
Abstract
Objective To evaluate the validity and reliability of inertial measurement unit (IMU) sensors in the assessment of spinal mobility in axial spondyloarthritis (axSpA). Methods A repeated measures study design involving 40 participants with axSpA was used. Pairs of IMU sensors were used to measure the maximum range of movement at the cervical (Cx) and lumbar (Lu) spine. A composite IMU score was defined by combining the IMU measures. Conventional metrology and physical function assessment were performed. Validation was assessed considering the agreement of IMU measures with conventional metrology and correlation with physical function. Reliability was assessed using intra-class correlation coefficients (ICCs). Results The composite IMU score correlated closely (r = 0.88) with the BASMI. Conventional Cx rotation and lateral flexion tests correlated closely with IMU equivalents (r = 0.85, 0.84). All IMU movement tests correlated strongly with BASFI, while this was true for only some of the BASMI tests. The reliability of both conventional and IMU tests (except for chest expansion) ranged from good to excellent. Test–retest ICCs for individual conventional tests varied between 0.57 and 0.91, in comparison to a range from 0.74 to 0.98 for each of the IMU tests. Each of the composite regional IMU scores had excellent test–retest reliability (ICCs=0.94–0.97), comparable to the reliability of the BASMI (ICC=0.96). Conclusion Cx and Lu spinal mobility measured using wearable IMU sensors is a valid and reliable assessment in multiple planes (including rotation), in patients with a wide range of axSpA severity.Funding Information
- Foundation for Research in Rheumatology
- FOREUM
This publication has 32 references indexed in Scilit:
- Modifying patterns of movement in people with low back pain -does it help? A systematic reviewBMC Musculoskeletal Disorders, 2012
- Towards monitoring lumbo-pelvic posture in real-life situations: Concurrent validity of a novel posture monitor and a traditional laboratory-based motion analysis systemManual Therapy, 2012
- A stratified model for health outcomes in ankylosing spondylitisAnnals Of The Rheumatic Diseases, 2011
- The use of inertial sensors system for human motion analysisPhysical Therapy Reviews, 2010
- The Assessment of SpondyloArthritis international Society (ASAS) handbook: a guide to assess spondyloarthritisAnnals Of The Rheumatic Diseases, 2009
- The Bath metrology index as assessed by a trained and an untrained rater in patients with spondylarthropathy: a study of intra- and inter-rater agreementsClinical Rheumatology, 2008
- Proposal of a linear definition of the Bath Ankylosing Spondylitis Metrology Index (BASMI) and comparison with the 2-step and 10-step definitionsAnnals Of The Rheumatic Diseases, 2007
- Development and validation of the Edmonton Ankylosing Spondylitis Metrology IndexArthritis Care & Research, 2006
- Evaluation of the smallest detectable difference in outcome or process variables in ankylosing spondylitisArthritis & Rheumatism, 2002
- Accuracy of an electromagnetic tracking device: A study of the optimal operating range and metal interferenceJournal of Biomechanics, 1996