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Am J Perinatol. 1996 Oct;13(7):423-31.

Screening primiparous women and newborns for fetal/neonatal alloimmune thrombocytopenia: a prospective comparison of effectiveness and costs. Immune Thrombocytopenia Working Group.

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Départment of Public Health, Hôpital Henri Mondor, Créteil, France.


A prospective study was conducted in three maternity wards to compare the medical outcomes and the costs of two screening strategies for the detection of fetal/neonatal alloimmune thrombocytopenia (FMAIT). A total of 2066 primiparas and 6081 newborns were included. Fifty-two primiparous women with HPA-1b phenotype were found, and 45 were followed during pregnancy. Four women developed antibodies, and two fetuses exhibited FMAIT; therefore, the prevalence of anti-HPA-1a was 2 per 1000, and the prevalence of FMAIT 1 per 1000. Forty-eight thrombocytopenic newborns were found out of a total of 5632 blood samples. Five were HPA-1a children whose mothers were HPA-1b. The cost-effectiveness of screening all primiparous women was $45,000 and of screening all newborns is $18,000-per anti-HPA-1a alloimmunization diagnosed. Costs per fetal death or disability averted were $500,000 for the primiparous strategy and $225,000 for the newborn strategy. In conclusion, screening newborns for neonatal alloimmune thrombocytopenia is more cost-effective than screening primiparous women.

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