Spondyloarthritis & psoriatic arthritis

Identification of the first signs or symptoms in different spondyloarthritis subtypes and their association with HLA-B27: data from REGISPONSER and RESPONDIA registries

RMD OpenPublished Cross-sectional study

Authors' conclusion

In this SpA population, MMs were the most prevalent initial symptoms, with differences across diagnoses and depending on the presence of the HLA-B27 antigen.

Study context

Population
Patients fulfilling ESSG criteria for spondyloarthritis (SpA) from the REGISPONSER and RESPONDIA united registries (ankylosing spondylitis (AS) 68.3%, psoriatic arthritis (PsA) 19.9%, undifferentiated SpA 11.8%)2,208 REGISPONSER, 1859 RESPONDIA
Participants
4,067 patients
Exposure
Initial musculoskeletal manifestations (MMs) vs EMMs; HLA-B27-positive vs HLA-B27-negative
  • MMsn = 3,624
  • EMMsn = 443reference
Outcome
First sign(s) or symptom(s) of SpA and their association with HLA-B27 status
Methodological detailsobservational, multicentre
  • Observational
  • Multicentre

Main finding

As reported in the abstract

Initial symptoms
Low back pain as initial symptom
61.7%
Lower-limb arthritis as initial symptom
38.5%

Observational data: associations, not effects.

Further findings

Diagnostic delay

Diagnostic delay

Diagnostic delay longer with initial MMs than with EMMs

Original publication

Identification of the first signs or symptoms in different spondyloarthritis subtypes and their association with HLA-B27: data from REGISPONSER and RESPONDIA registries. RMD Open. Published 21 September 2023. doi:10.1136/rmdopen-2023-003235

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