Figure 2 Bland–Altman plot showing agreement between the logarithm of NT‐proBNP plasma levels percentage change against the average of the logarithm of NT‐proBNP plasma levels in basal + stage I (A), stage I + stage II (B) and basal + stage II (C). The solid line represents the mean of the percentage change. The dashed lines define the limits of agreement (standard deviation of percentage of change ×1.96 SD). NT‐proBNP, N‐terminal pro‐brain natriuretic peptide; SD, standard deviation; stage I, 12‐month follow‐up; stage II, 24‐month follow‐up.