RT Journal Article SR Electronic T1 Prognostic predictors in younger and older incident idiopathic pulmonary arterial hypertension JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 4837 VO 42 IS Suppl 57 A1 Yi Ling A1 Martin Johnson A1 David Kiely A1 Robin Condliffe A1 Charlie Elliot A1 J. Simon R. Gibbs A1 Luke Howard A1 Joanna Pepke-Zaba A1 Karen Sheares A1 Paul Corris A1 Andrew Fisher A1 Jim Lordan A1 Sean Gaine A1 J. Gerry Coghlan A1 S. John Wort A1 Michael Gatzoulis A1 Andrew Peacock YR 2013 UL http://erj.ersjournals.com/content/42/Suppl_57/4837.abstract AB Background:We have recently shown that there are important phenotypic and survival differences between younger and older incident idiopathic pulmonary arterial hypertension patients (Ling et al, AJRCCM 2012;186:790-6). We sought to establish whether there are different prognostic associations between the two groups.Methods:Observational study of all incident idiopathic, heritable and anorexigen-associated pulmonary arterial hypertension diagnosed in all 8 pulmonary hypertension centres in the UK and Ireland between 2001-9 (n=482). Patients were divided into younger (age ≤50) and older (age>50) subgroups by the median age. Demographic and physiological data at diagnosis were analysed by multivariate Cox regression to determine independent predictors of survival.Results:View this table:Predictors of survival according to age subgroupsConclusion:While we have shown that younger and older patients with idiopathic pulmonary arterial hypertension have different characteristics and survival, here we show that there may also be some different associations with survival between the two groups which merit further evaluation.