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BMC Musculoskeletal Disorders

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Open Access 01-12-2021 | Spondyloarthropathy | Research article

Spinal mobility in radiographic axial spondyloarthritis: criterion concurrent validity of classic and novel measurements

Authors: John Charles Snow, Kyle Simpson, Proton Rahman, Samuel Howarth, Diana De Carvalho

Published in: BMC Musculoskeletal Disorders | Issue 1/2021

Abstract

Background

Limitations in spinal mobility are a characteristic feature of Axial Spondyloarthritis. Current clinical measurements of spinal mobility have shown low criterion-concurrent validity. This study sought to evaluate criterion-concurrent validity for a clinically feasible measurement method of measuring spine mobility using tri-axial accelerometers.

Methods

Fifteen radiographic-Spondyloarthritis patients were recruited for this study. Two postural reference radiographs, followed by three trials in forward, left and right lateral bending were taken. For all trials, three measurements were collected: tape (Original Schober’s, Modified Schober’s, Modified-Modified Schober’s, Lateral Spinal Flexion Test and Domjan Test), followed immediately by synchronized radiograph and accelerometer measurements at end range of forward and bilateral lateral flexion. The criterion-concurrent validity of all measurement methods was compared to the radiographic measures using Pearson’s correlation coefficients. A Bland-Altman analysis was conducted to assess agreement.

Results

In forward bending, the accelerometer method (r = 0.590, p = 0.010) had a stronger correlation to the radiographic measures than all tape measures. In lateral bending, the Lateral Spinal Flexion tape measure (r = 0.743, p = 0.001) correlated stronger than the accelerometer method (r = 0.556, p = 0.016). The Domjan test of bilateral bending (r = 0.708, p = 0.002) had a stronger correlation to the radiographic measure than the accelerometer method.

Conclusions

Accelerometer measures demonstrated superior criterion-concurrent validity compared to current tape measures of spinal mobility in forward bending. While a moderate correlation exists between accelerometer and radiographs in lateral 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.

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Title: Spinal mobility in radiographic axial spondyloarthritis: criterion concurrent validity of classic and novel measurements
Authors: John Charles Snow
Kyle Simpson
Proton Rahman
Samuel Howarth
Diana De Carvalho
Publication date: 01-12-2021
Publisher: BioMed Central
Keyword: Spondyloarthropathy
Published in: BMC Musculoskeletal Disorders / Issue 1/2021
Electronic ISSN: 1471-2474
DOI: https://doi.org/10.1186/s12891-021-04352-z

At a glance: The STEP trials

Springer Medicine

Spinal mobility in radiographic axial spondyloarthritis: criterion concurrent validity of classic and novel measurements

Abstract

Background

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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