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Receiver‐operating characteristic curve analysis of fresh urine NT‐proBNP/creatinine (pg/μg Cr) in heart failure patients with subsequent emergency department visits for decompensated heart failure. Urine NT‐proBNP/creatinine: cut‐off value, 0.272 pg/μgCr; sensitivity, 68.2%; specificity, 55.0%; AUC, 0.675; 95% CI, 0.543–0.806; P = 0.011.
