Short-term progression of interstitial lung disease in systemic sclerosis predicts long-term survival in two independent clinical trial cohorts.

Published

Journal Article

OBJECTIVE:To assess survival and identify predictors of survival in patients with systemic sclerosis-interstitial lung disease (SSc-ILD) who participated in the Scleroderma Lung Studies (SLS) I and II. METHODS:SLS I randomised 158 patients with SSc-ILD to 1  year of oral cyclophosphamide (CYC) vs placebo. SLS II randomised 142 patients to 1 year of oral CYC followed by 1 year of placebo vs 2 years of mycophenolate mofetil. Counting process Cox proportional hazard modelling identified variables associated with long-term mortality in SLS I and II. Internal validation was performed using joint modelling. RESULTS:After a median follow-up of 8 years, 42% of SLS I patients died, and when known the cause of death was most often attributable to SSc. There was no significant difference in the time to death between treatment arms in SLS I or II. Higher baseline skin score, older age, and a decline in the forced vital capacity (FVC) and the diffusing capacity for carbon monoxide (DLCO) over 2 years were independently associated with an increased risk of mortality in SLS I. The Cox model identified the same mortality predictor variables using the SLS II data. CONCLUSION:In addition to identifying traditional mortality risk factors in SSc (skin score, age), this study demonstrated that a decline in FVC and DLCO over 2 years was a better predictor of mortality than baseline FVC and DLCO. These findings suggest that short-term changes in surrogate measures of SSc-ILD progression may have important effects on long-term outcomes.

Full Text

Duke Authors

Cited Authors

  • Volkmann, ER; Tashkin, DP; Sim, M; Li, N; Goldmuntz, E; Keyes-Elstein, L; Pinckney, A; Furst, DE; Clements, PJ; Khanna, D; Steen, V; Schraufnagel, DE; Arami, S; Hsu, V; Roth, MD; Elashoff, RM; Sullivan, KM; SLS I and SLS II study groups,

Published Date

  • January 2019

Published In

Volume / Issue

  • 78 / 1

Start / End Page

  • 122 - 130

PubMed ID

  • 30409830

Pubmed Central ID

  • 30409830

Electronic International Standard Serial Number (EISSN)

  • 1468-2060

International Standard Serial Number (ISSN)

  • 0003-4967

Digital Object Identifier (DOI)

  • 10.1136/annrheumdis-2018-213708

Language

  • eng