Figure 3.

Subgroup 6-minute-walk distance (6MWD) MCID (95% confidence interval) estimates from the derivation (clinical trial) data on the basis of a change in physical component score of five. *Age and baseline 6MWD are analyzed as continuous variables. CHD-PAH = PAH associated with congenital heart disease; CTD-PAH = PAH associated with connective tissue disease; MCID = minimal clinically important difference; PAH = pulmonary arterial hypertension; WHO FC = World Health Organization functional class.