Inflammatory myopathies

Patient global assessment and inflammatory markers in patients with idiopathic inflammatory myopathies – A longitudinal study

Semin Arthritis RheumPublished Longitudinal registry study

Authors' conclusion

Increased levels of systemic inflammation are associated with poorer PGA in patients with IIM.

Study context

Population
Patients with idiopathic inflammatory myopathies (IIM) in the International MyoNet registry
Participants
1,200 patients
Outcome
Association between PGA and systemic inflammatory markers (ESR, CRP, creatine kinase (CK)) over time
Follow-up
Five years
Methodological detailsprospective data collection, mixed models, mediation analysis
  • Prospective data collection
  • Mixed models
  • Mediation analysis

Main finding

As reported in the abstract

Association between inflammatory markers and PGA
  • High levels of inflammatory markers were associated with worse patient global assessment (PGA) in both men and women across time points during five years
  • In men, but not in women, the association between elevated erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and poorer PGA was explained by measures of function and disease activity

Observational data: associations, not effects.

Further findings

Change in PGA and inflammatory markers · first year

PGA improved and inflammatory markers decreased
With a few exceptions, association between improved PGA and reduced inflammatory markers partially mediated by improvements in all measures of function and disease activity

Original publication

Patient global assessment and inflammatory markers in patients with idiopathic inflammatory myopathies – A longitudinal study. Semin Arthritis Rheum. Published 14 January 2024. doi:10.1016/j.semarthrit.2024.152379

Composed by AI from the published abstract and checked against it. How Briefs are made →

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