TABLE 6 ] .

Multivariable Predictors of Mortality

Predictors	Hazard Ratio	95% CI	P Valuea
NYHA/WHO FC IV	2.88	(1.53, 5.42)	.001
Renal insufficiency	2.64	(1.31, 5.32)	.007
Male	3.03	(1.68, 5.50)	< .001
High BNP, > 180 pg/mL or NT > 1,500 pg/mL	2.04	(1.16, 3.59)	.014
Low 6MWD, < 165 m	2.29	(1.01, 5.16)	.047
Prostacyclin-naive	1.21	(0.68, 2.14)	.52

BNP = b-type natriuretic peptide; NT = N-terminal pro b-type natriuretic pepetide. See Table 2 and 4 legends for expansion of other abbreviations.

^aA parameter for prostacylin-naive vs transitioned was forced in the model. P < .05 required for model inclusion for all other variables.