Table 2. Agreement between the B type natriuretic peptide and the inactive N-terminal pro-BNP chain. Comparison between normal and altered values.

			BNP		Total
			Normal	Altered
NT-proBNP	Normal	n	20	1	21
		%	14.5	0.7	15.2
	Altered	n	12	105	117
		%	8.7	76.1	84.8
Total		n	32	106	138
		%	23.2	76.8	100.0

NT-proBNP: N-terminal fraction of pro-BNP; BNP: B type natriuretic peptide.