NPPB and pulmonary arterial hypertension: In addition, the parameter was able to predict increased (NT-pro-) BNP levels (OR: 4.48; 95% CI: 1.59–12.60; p = 0.005) and patients with PAH categorised as high risk at the time of diagnosis (OR: 4.72; 95% CI: 1.24–17.93; p = 0.023).