1. Prenatal diagnosis versus first-trimester screening of trisomy 21 among pregnant women aged 35 or more.
- Author
-
Ghi T, Arcangeli T, Ravennati F, Salsi G, Montaguti E, Pacella G, Maroni E, Pittalis MC, Pompilii E, Pilu G, and Rizzo N
- Subjects
- Abortion, Eugenic statistics & numerical data, Adult, Chorionic Villi Sampling adverse effects, Chorionic Villi Sampling statistics & numerical data, Female, Fetal Death etiology, Humans, Infant, Newborn, Mass Screening methods, Mass Screening statistics & numerical data, Pregnancy, Prenatal Diagnosis adverse effects, Prenatal Diagnosis statistics & numerical data, Retrospective Studies, Down Syndrome diagnosis, Maternal Age, Pregnancy Outcome epidemiology, Pregnancy Trimester, First blood, Prenatal Diagnosis methods
- Abstract
Objective: To compare the policy of prenatal diagnosis versus first trimester screening of trisomy 21 among pregnant women of advanced age., Methods: A retrospective study was conducted on patients aged ≥35 divided in two groups: patients who requested first trimester combined test and only in case of screen-positive result underwent invasive testing (group A); patients undergoing chorionic villous sampling or amniocentesis as first investigation (group B). The following outcome variables were compared: antenatal detection of trisomy 21, occurrence of trisomy 21 at birth, miscarriage rate, hospitals' costs., Results: 4527 women were included. Of these, 534 (11.80%) underwent T21 screening whereas 3993 (88.20%) requested primary invasive testing. In group A, 64 combined test were positive (11.99%) and 8 trisomy 21 cases were diagnosed (1.50%); the loss of euploid fetuses after invasive procedure was 4.55% (2/44). No false-negative case was observed. In group B 57 cases of trisomy 21 were diagnosed (1.43%), and pregnancy loss rate of chromosomally normal fetuses was 0.45% (17/3806). The estimated cost was, respectively, 67.720€ for the primary screening versus 1.996.500€ for direct prenatal diagnosis., Conclusion: First trimester screening of trisomy 21 is highly accurate and cost saving among women ≥35.
- Published
- 2015
- Full Text
- View/download PDF