NPPB and atrial fibrillation: On multiple regression after correction for age, atrial fibrillation, New York Heart Association classification and left ventricular ejection fraction, the association between NLR and presence of ischaemic fibrosis (coefficient 0.68, 95% CI 0.23 to 1.12, p=0.003) and NT-proBNP (coefficient 0.0002, 95% CI 0.00006 to 0.0003, p=0.002) remained significant.