Table 1.

Recovery and reproducibility of the NT-proXNP RIA.

Recovery experiments (n = 7)
NT-proANP in serum, pmol/LNT-proBNP in serum, pmol/LMean (SD) amount detected, pmol/LMean (SD) recovery, %
200200256 (26)64 (6.4)
15002001037 (100)61 (5.9)
40002002615 (351)62 (8.3)
20015001078 (106)63 (6.2)
20040003339 (320)80 (7.6)
150015002443 (260)81 (8.6)
400015003956 (128)72 (2.3)
150040004413 (270)80 (4.9)
400040007174 (344)90 (4.3)
Reproducibility experiments (n = 10)
Pool 1Pool 2Pool 3
Within-assay
 Mean (SD), pmol/L472 (28)1769 (97)5984 (282)
 CV, %6.05.54.7
Between-assay
 Mean (SD), pmol/L494 (52)1794 (224)5890 (645)
 CV, %101211