Characteristics | Positive for ischaemia (n=26) | Negative for ischaemia (n=292) | All patients (N=318*) | P values |
Baseline NT-proBNP | <0.001 | |||
n | 26 | 292 | 318 | |
Median (25th, 75th) | 93.3 (31.1, 291.2) | 31.7 (9.8, 71.0) | 34.3 (10.7, 78.4) | |
Min, max | 0.0, 788.0 | 0.0, 2343 | 0.0, 2343 | |
2-Hour post-stress NT-proBNP† | <0.001 | |||
n | 25 | 289 | 314 | |
Median (25th, 75th) | 120.5 (38.8, 360.8) | 38.9 (10.3, 81.6) | 40.0 (11.3, 88.3) | |
Min, max | 0.0, 865.8 | 0.0, 1800 | 0.0, 1800 | |
Absolute 2-hour stress-delta NT-proBNP | <0.001 | |||
n | 25 | 289 | 314 | |
Median (25th, 75th) | 10.4 (6.0, 51.7) | 1.7 (−0.4, 8.7) | 2.1 (−0.3, 9.5) | |
Min, max | −152, 174.3 | −543, 108.0 | −543, 174.3 | |
Percentage 2-hour stress-delta NT-proBNP‡ | 0.05 | |||
n | 23 | 240 | 263 | |
Median (25th, 75th) | 15.7 (10.1, 31.1) | 7.9 (−4.6, 25.1) | 9.3 (−4.1, 25.5) | |
Min, max | −45.9, 75.8 | −100, 189.0 | −100, 189.0 | |
4-Hour post-stress NT-proBNP | 0.009 | |||
n | 16 | 155 | 171 | |
Median (25th, 75th) | 78.2 (38.2, 244.5) | 35.5 (13.3, 81.4) | 39.3 (14.8, 87.3) | |
Min, max | 10.9, 649.2 | 0.0, 1757 | 0.0, 1757 | |
Absolute 4-hour stress-delta NT-proBNP | 0.004 | |||
n | 16 | 155 | 171 | |
Median (25th, 75th) | 14.8 (5.0, 22.3) | 1.0 (−2.0, 10.3) | 1.8 (−1.3, 12.4) | |
Min, max | −36.9, 253.2 | −586, 64.5 | −586, 253.2 | |
Percentage 4-hour stress-delta NT-proBNP | 0.05 | |||
n | 15 | 135 | 150 | |
Median (25th, 75th) | 26.9 (6.4, 63.9) | 6.3 (−8.2, 30.5) | 8.2 (−7.3, 39.1) | |
Min, max | −17.1, 109.5 | −100, 285.5 | −100, 285.5 |
*2 patients with indeterminate stress tests excluded.
†Four patients had baseline and 4-hour samples drawn, but no 2-hour samples.
‡Unable to calculate percentage delta in patients with undetectable baseline values.
NT-proBNP, N-terminal pro-B type natriuretic peptide.