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Figure 3 Kaplan-Meier Curves for All-Cause Mortality in the 4 Categories of Patients

Patients were divided into 4 categories according to NT-proBNP concentrations at baseline and 4 months relative to a threshold (1,078 pg/ml) determined by ROC curves. Low $->$ low (patients with NT-proBNP below threshold at baseline and 4 months, n = 904 patients), high $->$ high (patients with NT-proBNP above threshold at baseline and 4 months, n = 599), high $->$ low (NT-proBNP above to below threshold, n = 125), and low $->$ high (NT-proBNP below to above threshold, n = 114). Log-rank test, chi-square = 96.5, p < 0.0001. NT-proBNP = N-terminal pro-brain natriuretic peptide; ROC = receiver-operator characteristic.

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