1. Primary care REFerral for EchocaRdiogram (REFER) in heart failure: a diagnostic accuracy study
by Clare J Taylor, Andrea K Roalfe, Rachel Iles, FD Richard Hobbs, , P Barton, J Deeks, D McCahon, MR Cowie, G Sutton, RC Davis, J Mant, T McDonagh, and L Tait
BJGP
Volume 67(655):e94-e102
January 26, 2017
©2017 by British Journal of General Practice

2. Flow diagram to show number of participants in REFER study.
Flow diagram to show number of participants in REFER study. Step 1 = clinical info +ECG+echo. Step 2 = CDR variables. Step 3 = NT–proBNP result. CDR = clinical decision rule. DNA = did not attend. NT-proBNP = N-Terminal pro-B type natriuretic peptide levels.
Clare J Taylor et al. Br J Gen Pract 2017;67:e94-e102
©2017 by British Journal of General Practice

3. Receiver operating characteristic curves of CDR+NT-proBNP or NT-proBNP alone for predicting heart failure.
Receiver operating characteristic curves of CDR+NT-proBNP or NT-proBNP alone for predicting heart failure. CDR = clinical decision rule. NT-proBNP = N-Terminal pro-B type natriuretic peptide levels.
Clare J Taylor et al. Br J Gen Pract 2017;67:e94-e102
©2017 by British Journal of General Practice