Spondyloarthritis & psoriatic arthritis

Power Doppler signal at the enthesis and bone erosions are the most discriminative OMERACT ultrasound lesions for spondyloarthritis (SpA): results from the DEUS (Defining Enthesitis on Ultrasound in Spondyloarthritis) multicentre study

Ann Rheum DisPublished Cross-sectional study

Authors' conclusion

Ultrasound could differentiate between SpA-related enthesitis and other forms of entheseal pathology (ie, mechanical enthesitis), thus improving the assessment of entheseal involvement in SpA.

Study context

Population
Patients with SpA and disease controls undergoing clinical and US examination of lower limb large entheses, 20 rheumatology centres
Participants
413 vs 282
Exposure
SpA vs disease controls
  • SpAn = 413
  • Disease controlsn = 282reference
Outcome
Discriminative value of OMERACT US lesions of enthesitis for SpA
Methodological detailsmulticentre, 20 rheumatology centres
  • Multicentre
  • 20 rheumatology centres

Main finding

As reported in the abstract

Association of OMERACT US lesions with SpA (multivariate)
SpA vs Disease controlsOdds ratio (95% CI)P value
PD at enthesis
8.77(4.40–19.20)
P < 0.001
Bone erosions
4.75(2.43–10.10)
P < 0.001

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)P value
Achilles tendon (only lower limb enthesis associated with SpA, multivariate)1.93 (1.30–2.88)P < 0.001
Active enthesitis9.20 (4.21–23.20)P < 0.001

Active enthesitis

Unlike individual OMERACT US lesions, consistently associated with most clinical measures of SpA disease activity and severity

Original publication

Power Doppler signal at the enthesis and bone erosions are the most discriminative OMERACT ultrasound lesions for SpA: results from the DEUS (Defining Enthesitis on Ultrasound in Spondyloarthritis) multicentre study. Ann Rheum Dis. Published 12 June 2024. doi:10.1136/ard-2023-225443

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