Systemic sclerosis & Raynaud's

Serum Type I Interferon Score for Prediction of Clinically Meaningful Disease Progression in Limited Cutaneous Systemic Sclerosis

Arthritis RheumatolPublished Retrospective cohort study

Authors' conclusion

Serum assessment of type I IFN activity is a valuable predictor of clinically meaningful outcomes in lcSSc.

Study context

Population
Patients with limited cutaneous systemic sclerosis (lcSSc) in a national, multicenter observational cohort
Participants
149 patients
Exposure
High vs low serum type I interferon (IFN) score
  • High IFNn = 67
  • Low IFNn = 82reference
Outcome
Time to clinical worsening (MINIMISE trial combined Morbi-mortality endpoint)
Methodological detailslongitudinal, national, multicenter observational cohort, time to clinical worsening design, Cox proportional hazard regressions
  • Longitudinal
  • National, multicenter observational cohort
  • Time to clinical worsening design
  • Cox proportional hazard regressions

Main finding

As reported in the abstract

TTCW
Hazard ratio (95% CI)P value
High IFNvs Low IFNP for TTCW difference
5.5(2.7–11.3)
P < 0.001
IFN score (continuous)independently of clinical variables
2.38(1.4–4.0)

Observational data: associations, not effects.

Further findings

Proportion meeting the endpoint

P < 0.001

Clinical features and time to clinical worsening (TTCW)

PAH, ILD, digital ulcers and mRSS were associated with TTCW
These clinical features improve risk stratification over time in combination with IFN score (exploratory)

Original publication

Serum Type I Interferon Score for Prediction of Clinically Meaningful Disease Progression in Limited Cutaneous Systemic Sclerosis. Arthritis Rheumatol. Published 3 March 2025. doi:10.1002/art.43120

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