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Validation of Correction Factors for Serum Markers for First-Trimester Down Syndrome Screening in Singleton Pregnancies Conceived with Assisted Reproduction.
- Source :
- Fetal Diagnosis & Therapy; Nov2013, Vol. 34 Issue 4, p217-224, 8p
- Publication Year :
- 2013
-
Abstract
- Objective: To validate previously computed correction factors for free β-human chorionic gonadotrophin (fβ-hCG) and pregnancy-associated plasma protein-A (PAPP-A) in in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) pregnancies with hormone treatment and to determine the effect on false-positive rate (FPR). Methods: Retrospective study on 249 IVF and 250 ICSI cases and 20,190 controls. Correction factors 1.42 (PAPP-A), 1.17 (fβ-hCG) in IVF; 1.56 (PAPP-A) in ICSI were applied on the absolute serum concentrations. Analysis was done on log<subscript>10</subscript>-transformed multiples of medians (MoMs). Results: In the controls, mean PAPP-A and fβ-hCG MoM were 1.004 and 1.062. Before correction, mean PAPP-A MoM was significantly lower in IVF (0.757; p < 0.001) and in ICSI (0.671; p < 0.001) and after correction comparable (1.071; p = 0.053 in IVF; 1.048; p = 0.178 in ICSI). Before correction, mean fβ-hCG MoM was comparable (1.054; p = 0.59 in IVF and 1.051; p = 0.56 in ICSI) and after correction significantly higher in IVF (1.241; p < 0.001). After correction the likelihood for receiving a false-positive result was 1.03 in IVF pregnancies (95% CI 0.98-1.09; p = 0.248) and 1.02 in ICSI pregnancies (95% CI 0.97-1.07; p = 0.448). Conclusions: After correction the FPR in IVF and ICSI pregnancies with hormone treatment reduces to the observed FPR in the controls. © 2013 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10153837
- Volume :
- 34
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Fetal Diagnosis & Therapy
- Publication Type :
- Academic Journal
- Accession number :
- 92677526
- Full Text :
- https://doi.org/10.1159/000355527