Table 3. Comparison of different parameters in predicting death due to progressive heart failure or the occurrence of overt heart failure.

Variables	Optimal cut-off value	Sensitivity	Specificity	PPV	NPV	Overall accuracy
Homoarginine	1.08 μmol/l	93.8%	85.3%	46.9%	99.0%	86.4%
NT-proBNP	341.2 pg/ml	87.5%	78.5%	35.9%	97.8%	79.6%
NYHA functional class	2.5	76.5%	96.6%	76.5%	96.6%	94.0%
Ejection fraction of SV	37.1%	50.0%	94.8%	57.1%	93.2%	89.3%
VTI above aortic valve	19.7 cm	57.1%	86.1%	33.3%	94.3%	83.0%
γGT	57.5 U/l	75.0%	71.9%	27.3%	95.3%	72.3%
Albumin	43.5 g/l	66.7%	87.5%	47.6%	93.9%	84.5%

PPV, positive predictive value; NPV, negative predictive value; NYHA, New York Heart Association; SV, systemic ventricle; VTI, velocity time integral