NPPB and atrial fibrillation: The regression equation of the model was: L = Persistent AF + Course of AF × 0.463/1.512 + LAD × 0.098/1.512−eGFR × 0.074/1.512 + NT-proBNP × 0.009/1.512 + Anti-M2-R × 0.008/1.512.