Linskens, Ingeborg H.;
Levitus, Marieke;
Frans, Anneke;
Schielen, Peter C.J.I.;
van Vugt, John M.G.;
Blankenstein, Marinus A.;
Dijstelbloem, Hilde M.
Performance of free β-human chorionic gonadotrophin (free β-hCG) and pregnancy associated plasma protein-A (PAPP-A) analysis between Delfia Xpress and AutoDelfia systems in The Netherlands
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Media type:
E-Article
Title:
Performance of free β-human chorionic gonadotrophin (free β-hCG) and pregnancy associated plasma protein-A (PAPP-A) analysis between Delfia Xpress and AutoDelfia systems in The Netherlands
Contributor:
Linskens, Ingeborg H.;
Levitus, Marieke;
Frans, Anneke;
Schielen, Peter C.J.I.;
van Vugt, John M.G.;
Blankenstein, Marinus A.;
Dijstelbloem, Hilde M.
imprint:
Walter de Gruyter GmbH, 2009
Published in:Clinical Chemistry and Laboratory Medicine
Description:
<jats:title>Abstract</jats:title><jats:p>: The VU University Medical Center (VUmc) was the first hospital in the Netherlands to introduce the Delfia Xpress for the analysis of free β-human chorionic gonadotrophin (β-hCG) and pregnancy associated plasma protein-A (PAPP-A) in the first trimester screening program for Down syndrome. Since then, others have implemented this system. In this study, we tested the equality of measurements for free β-hCG and PAPP-A between Delfia Xpress systems and one AutoDelfia system.</jats:p><jats:p>: A total of 40 serum samples were aliquoted and stored at –20°C. Samples were analyzed by six Delfia Xpress systems and one AutoDelfia system over a time period of 2 years.</jats:p><jats:p>: The relationships between free β-hCG and PAPP-A were excellent for the different Delfia Xpress systems (r>0.99, p<0.0001). For PAPP-A, the agreement between the main system at VUmc and five other systems was linear with slopes between 0.99 and 1.06. Similarly, agreement for free β-hCG was linear with slopes between 0.99 and 1.09. Likewise, agreement for PAPP-A and free β-hCG was excellent for the AutoDelfia vs. the main Delfia Xpress at the VUmc (r>0.99, p<0.0001). For both PAPP-A and free β-hCG, the relationships were linear with slopes of 1.08 and 1.07.</jats:p><jats:p>: We demonstrate an excellent agreement for the analysis of PAPP-A and free β-hCG between Delfia Xpress systems and one AutoDelfia system.</jats:p><jats:p>Clin Chem Lab Med 2009;47:222–6.</jats:p>