Table 2– Associations between sex and baseline haemodynamics in subjects with idiopathic pulmonary arterial hypertension, stratified by age group for mean pulmonary artery pressure

Variable	Difference between males and females	95% CI	p-value
Right atrial pressure mmHg	1.36	0.44–2.27	0.004
Mean pulmonary arterial pressure mmHg
Age <45 years	5.43	2.20–8.66	0.001
Age 45–54 years	1.37	-2.64–5.37	0.50
Age 55–64 years	-1.45	-5.70–2.81	0.50
Age ≥65 years	3.06	-1.31–7.43	0.17
Cardiac output L·min⁻¹	-0.21	-0.43–0.01	0.06
Pulmonary capillary wedge pressure mmHg	0.19	-0.38–0.77	0.51
Pulmonary vascular resistance Wood units	1.23	0.18–2.27	0.02

Adjusted for age (if no sex–age interaction), race, height, weight and study.