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Serial measurement of NT-proBNP is performed routinely in the monitoring and assessment of the effectiveness of therapy in patients being treated for chronic heart failure (CHF). Intra-individual changes in NT-proBNP levels over time are compared typically to a reference change value (RCV) determined using either a standard [i.e., nested analysis of variance (nANOVA)] or a lognormal approach. The...
To evaluate differences in analytical performance and clinical results of BNP and NT-proBNP immunoassays, a proficiency testing program, called CardioOrmoCheck study, has been organized since 2005 under the patronage of the Study Group of the Cardiovascular Biomarkers of the Italian Society of Clinical Biochemistry (SIBIOC). On average more than 100 Italian laboratories were involved in the annual...
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