Down syndrome: Perinatal mortality risks with each additional week of expectant management

Teresa N. Sparks, Emily Griffin, Jessica Page, Rachel Pilliod, Brian Shaffer, Aaron Caughey

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Objective: To evaluate the gestational age (GA) at which perinatal mortality risk is minimized for fetuses with Down syndrome (DS). Methods: Retrospective cohort of singleton pregnancies delivered between 24 and 41weeks, using 2005-2006 United States linked birth and death certificate data. Among fetal DS cases, prospective risk of intrauterine fetal demise (IUFD) and risk of infant death were calculated for each week, and composite risk of fetal/infant mortality with expectant management was compared to delivery. Results: Of 3113098 pregnancies, 1766 had fetal DS (0.06%). IUFD occurred in 7.4% with DS, and infant death in 6.5%. Prospective risk of IUFD increased from 37weeks onward to reach 50.7 per 1000 pregnancies (95% CI 33.2-68.3) at 42weeks. Comparing mortality with expectant management to delivery, expectant management carried increasing risk from 38 (RR 1.18; 95% CI 1.05-1.33) to 41weeks (RR 1.84; 95% CI 1.66-2.05). Further, number needed to deliver to avoid one excess death decreased from 38 (109.17; 95% CI 64.52-344.83) to 41weeks (24.08; 95% CI 20.59-29.04). Conclusions: Although further research is needed to clarify risk factors for fetal and neonatal death in cases of DS, risk of perinatal mortality appears to be minimized with delivery at 38weeks.

Original languageEnglish (US)
JournalPrenatal Diagnosis
DOIs
StateAccepted/In press - 2016

Fingerprint

Perinatal Mortality
Down Syndrome
Fetal Death
Pregnancy
Birth Certificates
Fetal Mortality
Death Certificates
Infant Mortality
Gestational Age
Fetus
Mortality
Research

ASJC Scopus subject areas

  • Genetics(clinical)
  • Obstetrics and Gynecology

Cite this

Down syndrome : Perinatal mortality risks with each additional week of expectant management. / Sparks, Teresa N.; Griffin, Emily; Page, Jessica; Pilliod, Rachel; Shaffer, Brian; Caughey, Aaron.

In: Prenatal Diagnosis, 2016.

Research output: Contribution to journalArticle

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abstract = "Objective: To evaluate the gestational age (GA) at which perinatal mortality risk is minimized for fetuses with Down syndrome (DS). Methods: Retrospective cohort of singleton pregnancies delivered between 24 and 41weeks, using 2005-2006 United States linked birth and death certificate data. Among fetal DS cases, prospective risk of intrauterine fetal demise (IUFD) and risk of infant death were calculated for each week, and composite risk of fetal/infant mortality with expectant management was compared to delivery. Results: Of 3113098 pregnancies, 1766 had fetal DS (0.06{\%}). IUFD occurred in 7.4{\%} with DS, and infant death in 6.5{\%}. Prospective risk of IUFD increased from 37weeks onward to reach 50.7 per 1000 pregnancies (95{\%} CI 33.2-68.3) at 42weeks. Comparing mortality with expectant management to delivery, expectant management carried increasing risk from 38 (RR 1.18; 95{\%} CI 1.05-1.33) to 41weeks (RR 1.84; 95{\%} CI 1.66-2.05). Further, number needed to deliver to avoid one excess death decreased from 38 (109.17; 95{\%} CI 64.52-344.83) to 41weeks (24.08; 95{\%} CI 20.59-29.04). Conclusions: Although further research is needed to clarify risk factors for fetal and neonatal death in cases of DS, risk of perinatal mortality appears to be minimized with delivery at 38weeks.",
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