Table 3 B‐type natriuretic peptide (BNP) concentrations defined by normal and abnormal test results for all patients.

Test	Number with valid test result	BNP (pg/ml)
		Normal test result	Abnormal test result
ETT	104	26.1 (18.7)	59.2 (44.9)***
Duke score	181	25.9 (19.1)	33.9 (31.3)*

BNP concentration is median (interquartile range) for each normal or abnormal test result.

*p<0.05, ***p<0.001 between normal and abnormal result.

ETT, exercise tolerance test.