Table 3—

Baseline clinical characteristics of patients by aetiology of pulmonary arterial hypertension(PAH)

Clinical DataIPAH/FPAHCTDCongenital heart diseaseAnorexigenHIVPortal hypertensionp-value
Age yrs45±1455±1542±1252±1140±449±9<0.0001
WHO functional class
 Class I7310007
 Class II13921194322
 Class III494945564349
 Class IV313924251422
Exercise capacity METs3.7±3.13.1±2.73.9±2.93.6±3.23.3±3.73.5±3.00.199
  • Data are presented as mean±sd or %, unless otherwise stated. IPAH: idiopathic PAH; FPAH: familial PAH; CTD: connective tissue disease; WHO: World Health Organization; METs: metabolic equivalents.