The comparison of the plasma and salivary NT-proBNP concentrations for HF patients (n = 45).

<p>(A), NT-proBNP levels in saliva of HF patients (n = 45) and healthy participants (n = 40). (B), The correlation of NT-proBNP concentrations in plasma and saliva of HF patients measured by our NT-proBNP immunoassay.</p

Comparison of the NT-proBNP immunoassay when compared with a commercially available diagnostic assay (Roche Diagnostics, USA).

<p>r2 = 0.78 and p<0.001.</p

Performance characteristics of our NT-proBNP immunoassay.

<p>Performance characteristics of our NT-proBNP immunoassay.</p

Characteristics of HF patients and healthy controls.

<p>Results are shown as median (min-max) for the data without normal distribution.</p><p>P_M = p-value for 2-tailed Mann-Whitney <i>U</i> test.</p><p>P_C = p-value for 2-sided Chi-square test.</p>*<p>Significant at 0.05 level.</p><p>n/a = Not applicable.</p