Spondyloarthritis & psoriatic arthritis

Sensitivity to change of structural outcomes in axial spondyloarthritis after 10 years of follow up. Data from the DESIR cohort

RMD OpenPublished Prospective cohort study

Authors' conclusion

MRI structural outcomes in the SIJ (ie, fatty lesions) are more sensitive to change than radiographic outcomes. Conversely, the mSASSS remains the most sensitive method, even when compared with MRI of the spine.

Study context

Population
Patients with axial spondyloarthritis (axSpA) from the DESIR cohort; Sacroiliac joints (SIJ) and spine radiographs and MRIs at baseline and 1, 2, 5 and 10 years46% males, mean age 33.6 years
Participants
659 patients
Outcome
Sensitivity to change (relative standardised yearly rate of change) of structural imaging outcomes
Follow-up
10 years
Methodological detailsgeneralised estimating equation models, standardised rate of change
  • Generalised estimating equation models
  • Standardised rate of change

Main finding

As reported in the abstract

Relative standardised rate of change per year

SIJ: most sensitive outcome (MRI and radiographs) was ≥3 fatty lesions at a specific timepoint, vs modified New York criteria as reference

5.28

Spine: most sensitive outcome (MRI and radiographs) was modified Stoke Ankylosing Spondylitis Spinal Score (mSASSS), vs ≥1 syndesmophyte as reference

1.76

Observational data: associations, not effects.

Original publication

Sensitivity to change of structural outcomes in axial spondyloarthritis after 10 years of follow up. Data from the DESIR cohort. RMD Open. Published 25 July 2024. doi:10.1136/rmdopen-2024-004400

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