Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Receiver operating characteristic plot of N terminal fragment pro B-type natriuretic peptide compared with clinical assessment, grouped by study design and index test for all thresholds. Based on data for seven studies. Size of symbol indicates study size
