| Temporal Effect of Afro-Caribbean Race on Serum Pregnancy-Associated Plasma Protein-A at 9-13 Weeks' Gestation in Screening for Aneuploidies. | |
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MedLine Citation:
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PMID: 22377654 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Objective: It was the aim of this study to investigate the pregnancy characteristics that influence the measured concentrations of maternal serum-free β-human chorionic gonadotropin (β-hCG) and pregnancy-associated plasma protein-A (PAPP-A) at 9(+0)-13(+6) weeks' gestation. Methods: In singleton pregnancies attending for routine care, serum-free β-hCG and PAPP-A were measured at 9(+0)-13(+6) weeks' gestation and fetal nuchal translucency was measured at 11(+0)-13(+6) weeks. The population included 27,908 chromosomally normal and 104 trisomy 21 pregnancies. Multiple regression analysis was used to examine the pregnancy characteristics that have a significant effect on the measured concentrations of free β-hCG and PAPP-A. We also examined the impact of incorporating temporal effects on performance of screening for trisomy 21. Results: Serum-free β-hCG and PAPP-A concentrations were significantly affected by gestational age, maternal weight, racial origin, parity, preexisting diabetes mellitus type 2, smoking and conception by in vitro fertilization. There was a significant gestational age-dependent effect of Afro-Caribbean race on PAPP-A levels (p = 0.0005), with a weekly increase of 4.9% (95% CI 2.1-7.8). Conclusions: Serum-free β-hCG and PAPP-A concentrations at 9(+0)-13(+6) weeks' gestation are affected by several pregnancy characteristics and the effect of Afro-Caribbean race on PAPP-A increases with gestational age. |
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Authors:
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Susan Ball; David Wright; Danielle Sodre; Robert Lachmann; Kypros H Nicolaides |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-25 |
Journal Detail:
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Title: Fetal diagnosis and therapy Volume: - ISSN: 1421-9964 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-3-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9107463 Medline TA: Fetal Diagn Ther Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 S. Karger AG, Basel. |
Affiliation:
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School of Computing and Mathematics, Plymouth University, Plymouth, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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