title: Predicting survival in pulmonary arterial hypertension in the UK.
abstract: Contemporary prognostic equations in pulmonary arterial hypertension (PAH) derived from US and French cohorts may not perform as well in the UK as a locally derived scoring scheme. The aim of the study was to develop and validate a UK risk score to predict prognosis in PAH. Baseline mortality predictors identified by multivariate Cox analysis in 182 incident PAH patients were used to derive the Scottish composite score (SCS). Its prognostic performance in an independent UK cohort was compared with the French registry and Pulmonary Hypertension Connection (PHC) registry equations using Brier scores (BS). The SCS based on age, sex, aetiology, right atrial pressure, cardiac output and 6-min walk distance predicted survival in the validation cohort (hazard ratio (HR) 1.7 per point increase; p<0.001) and provided further prognostic stratification in World Health Organization (WHO) functional class III patients (HR 1.8 per point increase; p<0.001). It was more accurate than the French registry equation in predicting 1-yr survival (BS: 0.092 versus 0.146; p=0.001) and 2-yr survival (0.131 versus 0.255; p<0.001). There was no significant difference in BS between the SCS and PHC registry equation. The SCS predicts survival and can be used to supplement WHO functional class in prognostication.
authors.affiliation: Scottish Pulmonary Vascular Unit, Level 1, Golden Jubilee National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK.
authors.forename: Wai-Ting Nicola
authors.initials: WT
authors.lastname: Lee
authors.forename: Yi
authors.initials: Y
authors.lastname: Ling
authors.forename: Karen K
authors.initials: KK
authors.lastname: Sheares
authors.forename: Joanna
authors.initials: J
authors.lastname: Pepke-Zaba
authors.forename: Andrew John
authors.initials: AJ
authors.lastname: Peacock
authors.forename: Martin Keith
authors.initials: MK
authors.lastname: Johnson
mesh_terms: D000367:Age Factors; D000368:Aged; D015331:Cohort Studies; D005080:Exercise Test; D065627:Familial Primary Pulmonary Hypertension; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D006976:Hypertension, Pulmonary / Q000209:etiology / Q000401:mortality*; D008168:Lung / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D011379:Prognosis; D012042:Registries / Q000706:statistics & numerical data; D012129:Respiratory Function Tests; D018570:Risk Assessment; D012720:Severity of Illness Index; D012737:Sex Factors; D006113:United Kingdom / Q000453:epidemiology