Table 3– Clinical and haemodynamic characteristics of patients with pulmonary arterial hypertension already diagnosed at last evaluation before IFN exposure

Subjects	16
Age years	46 (40–51)
Sex
Female	2 (13)
Male	14 (87)
NYHA-FC
I-II	13 (81)
III-IV	3 (19)
6MWD m	460 (409–479)
Haemodynamics
RAP mmHg	5±3
mPAP mmHg	42±11
PAWP mmHg	7±3
Cardiac output L·min⁻¹	6.8±1.7
PVR Wood Units	5.8±2.6

Data are presented as n, median (interquartile range), n (%) or mean±sd. NYHA-FC: New York Heart Association Functional Class; 6MWD: 6-min walk distance; RAP: right atrial pressure; mPAP: mean pulmonary artery pressure; PAWP: pulmonary artery wedged pressure; PVR: pulmonary vascular resistance.