Table 3

Log-rank test p values for pairwise comparisons of risk groups at baseline and follow-up

	Risk-group comparison	All	IPAH/HPAH/DPAH	CTD-PAH	CHD-PAH
Baseline	Low versus intermediate	<0.001	<0.001	0.006	0.122
	Low versus high	<0.001	<0.001	<0.001	<0.001
	Intermediate versus high	<0.001	<0.001	<0.001	<0.001
Follow-up	Low versus intermediate	<0.001	<0.001	<0.001	0.012
	Low versus high	<0.001	<0.001	<0.001	<0.001
	Intermediate versus high	<0.001	0.004	0.066	<0.001

CHD, congenital heart disease; CTD, connective tissue disease; DPAH, drug-induced PAH; HPAH, heritable PAH; IPAH, idiopathic PAH; PAH, pulmonary arterial hypertension.