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Predicted probability of new AF diagnosis in relation to NT-proBNP quartiles in the high-risk group. 1, quartile 1 (NT-proBNP 125–171 ng/L); 2, quartile 2 (NT-proBNP 171–236 ng/L); 3, quartile 3 (NT-proBNP 237–352 ng/L); and 4, quartile 4 (NT-proBNP 353–9000 ng/L). AF, atrial fibrillation; NT-proBNP, N-terminal B-type natriuretic peptide.
