Table 5 Sensitivity and specificity of B‐type natriuretic peptide (BNP) in predicting an abnormal exercise tolerance test in patients with no history of ischaemic heart disease.

BNP (pg/ml)	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
>20	87	37	21	90
>35	69	72	34	91
>40	63	81	42	90