Systemic sclerosis & Raynaud's

Cumulative disease damage and anti-PM/Scl antibodies are associated with a heavy burden of calcinosis in systemic sclerosis

Rheumatology (Oxford)Published Retrospective cohort study

Authors' conclusion

Calcinosis burden is associated with cumulative SSc-related tissue damage. Independent of disease severity, autoantibodies to PM/Scl are also associated with a heavy burden of calcinosis.

Study context

Population
Patients in the Johns Hopkins Scleroderma Center Research Registry with SSc997 with calcinosis
Participants
3,388 patients
Exposure
Latent phenotypic classes and autoantibodies as risk factors for heavy vs light vs no calcinosis
Outcome
Calcinosis burden (heavy, light or none) by pre-specified definitions
Methodological detailsregistry-based, latent class analysis, multinomial logistic regression
  • Registry-based
  • Latent class analysis
  • Multinomial logistic regression

Main finding

As reported in the abstract

Heavy burden of calcinosis
Odds ratio (95% CI)P value
Diffuse/severe classvs Limited class
6.92(3.66–13.08)
P < 0.001
Anti-PM/Scl
17.31(7.72–38.81)
P < 0.001

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)P value
Light burden of calcinosisDiffuse/severe classvs Limited class2.88 (2.11–3.95)P < 0.001

Light burden of calcinosis

OR (95% CI)P value
Anti-PM/Scl3.59 (1.84–7.00)P < 0.001

Prevalence of calcinosis; heavy burden among those with calcinosis

Calcinosis, all patients
29.4% (997/3388)
Heavy burden among those with calcinosis
13.5% (130/963)

Original publication

Cumulative disease damage and anti-PM/Scl antibodies are associated with a heavy burden of calcinosis in systemic sclerosis. Rheumatology (Oxford). Published 5 December 2022. doi:10.1093/rheumatology/keac682

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