TABLE 1.

Summary of four registries assessing risk scores

	REVEAL [17–19]	Swedish PAH Register [6]	COMPERA [7]	French Pulmonary Hypertension Network [8]#
Required variables n	12–14	8	8	4
Patients at baseline n	2716	530	1588	1017
Patients at follow-up n	2529	383	1094	1017
Associated PAH included	Yes	Yes	Yes	No
Definition of low risk	≤6 REVEAL score	<1.5 average score	<1.5 average score	3–4 out of 4 low-risk criteria
1-year mortality by risk group (low/intermediate/high) %	≤2.6/7.0/≥10.7	1.0/7.0/26.0	2.8/9.9/21.2	1.0/NA/13.0–30.0

PAH: pulmonary arterial hypertension; NA: not available. ^#: incident patients only.