RT Journal Article SR Electronic T1 Significance of pulmonary involvement in systemic sclerosis (SSc)– data from the German SSc-network JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP PA3657 DO 10.1183/13993003.congress-2018.PA3657 VO 52 IS suppl 62 A1 Michael Kreuter A1 Francesco Bonella A1 Nobert Blank A1 Elise Siegert A1 Joerg Henes A1 Margitta Worm A1 Cord Sunderkoetter A1 Marc Schmalzing A1 Alexander Kreuter A1 Claudia Guenther A1 Laura Susok A1 Gabriele Zeidler A1 Ina Koetter A1 Ulf Mueller-Ladner A1 Thomas Krieg A1 Aaron Juche A1 Tim Schmeiser A1 Gabriele Riemekasten A1 Elisabeth Aberer A1 Noemi Gaebelein-Wissing A1 Joerg H. W. Distler A1 Miklos Sardy A1 Christiane Pfeiffer A1 Kathrin Kuhr A1 Hanns-Martin Lorenz A1 Pia Moinzadeh A1 Nicolas Hunzelmann YR 2018 UL http://erj.ersjournals.com/content/52/suppl_62/PA3657.abstract AB Background: Pulmonary involvement is the leading cause of death in SSc and can manifest as interstitial lung disease (ILD), pulmonary hypertension (PAH) or a combination (ILD-PH). Aim of this analysis was to determine prevalence, clinical characteristics and outcomes of these different forms within the German SSc Network.Methods: SSc pts were analyzed for pulmonary involvement, clinical characteristics and outcome.Results: There were 3699 pts in 42 centers with a mean follow up time of 34.4±12.6 months. At baseline, ILD was frequent (29.5%), while ILD-PH and PAH had lower prevalence (7.5%, 6.1%). At the end of follow up, 32% of SSc pts had ILD, 13% ILD-PH and 7% PAH. ILD and ILD-PH were more frequent in the diffuse form (47%, 12%), while PAH did not differ between subforms. Significant differences in baseline characteristics between PAH vs. ILD-PH vs. ILD were found for age (62, 59, 54 years), sex (males: 15%, 22%, 24%) and smoking prevalence (non-smokers 49%, 63%, 57%). Mean DLCO and FVC were 56% / 93 % for PAH, 49% / 78% for ILD-PH and 56% / 81% for ILD. Significant decreases for DLCO (≥15%) and FVC (≥10%) were found in 45% / 26% in PAH, 45% / 26% for ILD-PH and 36% / 16% in ILD. All-cause mortality was 8.1% for the total cohort and differed significantly between patients without pulmonary involvement (4%), ILD (7.8%), PAH (14.2%), and ILD-PH (21%, p<0.001).Conclusions: ILD is the most prevalent pulmonary involvement in SSc, while PH-ILD is associated with the most detrimental survival. Significant differences in baseline characteristics of types of pulmonary SSc involvement may help identify patients at risk in the future.FootnotesCite this article as: European Respiratory Journal 2018 52: Suppl. 62, PA3657.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).