Systemic sclerosis & Raynaud's

Risk factors for lung function decline in systemic sclerosis-associated interstitial lung disease in a large single-centre cohort

Rheumatology (Oxford)Published Retrospective cohort study

Authors' conclusion

Our study confirms that ppFVC is a marker of survival in SSc-ILD, supporting its use for risk stratification to identify patients who may benefit from earlier interventions and treatment. Our study also supports the role of ATA positivity as a predictive marker for ppFVC decline in this population.

Study context

Population
Patients with SSc-ILD on HRCT Chest with serial pulmonary function tests, large single-centre cohortlongitudinal analysis
Participants
184 patients
Exposure
Alive vs Died within 2 years
  • Aliven = 163reference
Outcome
Risk factors of ppFVC decline
Methodological detailssingle-centre, longitudinal, linear mixed effect models
  • Single-centre
  • Longitudinal
  • Linear mixed effect models

Main finding

As reported in the abstract

Risk factors for ppFVC decline
  • Univariate: longer disease duration (>2.37 years), ILD extent >20% and ATA positivity significantly associated with percent predicted forced vital capacity (ppFVC) decline
  • Multivariate: ATA positivity the only statistically significant variable associated with ppFVC decline

Observational data: associations, not effects.

Further findings

Mean

OutcomeAliveDied within 2 yearsP value
Mean decline in ppFVC by survival−0.13%−8.28%P-value 0.0002 for the change in ppFVC trajectory

Mean decline in ppFVC, overall

Overall mean decline in ppFVC (P-value 0.029)
−0.28%

Original publication

Risk factors for lung function decline in systemic sclerosis-associated interstitial lung disease in a large single-centre cohort. Rheumatology (Oxford). Published 15 November 2022. doi:10.1093/rheumatology/keac639

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