NPPB and atrial fibrillation: Overall, NT-proBNP was associated with the primary outcome (HR 1.81 [1.53, 2.15] P < 0.001; Supplementary material online, Figure S2A) and with recurrent AF (HR 1.52 [1.37, 1.69] P = 0.234; Supplementary material online, Figure S2B).