Despite large sample size (N = 1383), lower age of patients (59 years old), and statistical significance (P < 0.0001), it should be acknowledged that only moderate strength of the relationship (r = 0.4) between does not warrant conclusion that NT‐proBNP is a strong/excellent predictor (or marker) of functional capacity, i.e. peak O2 consumption in chronic heart failure. Here, NPPB is linked to congestive heart failure.