NPPB and pulmonary fibrosis: The following points were assigned to the identified predictors of one-year mortality based on their respective hazard ratios in the multivariable Cox regression analysis to comprise the risk assessment score (Table 4): 4 points for pulmonary fibrosis without emphysema, 3 points for age > 65 years, 2 points for PVR > 5 WU, 3 points for BNP > 200 pg/dL, and 2 points for 6MWD < 150 m.