Systemic sclerosis & Raynaud's

Inflammatory Arthritis in Systemic Sclerosis: Its Epidemiology, Associations, and Morbidity

Arthritis Care Res (Hoboken)Published Prospective cohort study

Authors' conclusion

IA is a common disease manifestation that is more frquently seen in diffuse disease. IA is associated with poor HRQoL and physical disability.

Study context

Population
Patients with systemic sclerosis (SSc) prospectively enrolled in the Australian Scleroderma Cohort Study
Exposure
SSc with IA vs SSc without IA
Outcome
Epidemiology, associations and impact of IA in SSc
Methodological detailslogistic regression
  • Logistic regression

Main finding

As reported in the abstract

Prevalence of IA · median follow-up of 4.3 (1.7-8.4) years

IA

33.3%

Observational data: associations, not effects.

Further findings

Associations of IA with SSc manifestations

OR (95% CI)P value
Diffuse SSc1.33 (1.01–1.74)P = 0.042
Concurrent musculoskeletal manifestations (joint contractures and tendon friction rubs)1.70 (1.34–2.15)P < 0.001
Myositis2.11 (1.39–3.20)P < 0.001
Sicca symptoms1.57 (1.14–2.16)P = 0.006
PAHNegative association0.52 (0.35–0.78)P = 0.002

Serological associations of IA

OR (95% CI)P value
RF1.13 (0.88–1.44)P = 0.331
U1 small nuclear RNP1.46 (0.89–2.39)P = 0.129

Positive anti-CCP antibodies

P < 0.001

Health-related quality of life (HRQoL) and physical disability · significantly lower HRQoL with IA
P < 0.001
HRQoL and physical disability · more physical disability with IA
P < 0.001

Original publication

Inflammatory Arthritis in Systemic Sclerosis: Its Epidemiology, Associations, and Morbidity. Arthritis Care Res (Hoboken). Published 4 March 2024. doi:10.1002/acr.25311

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