Sibling Risk for Adverse Pregnancy Outcomes
Author Information
Author(s): Jevon Plunkett, Ingrid Borecki, Thomas Morgan, David Stamilio, Louis J Muglia
Primary Institution: Washington University School of Medicine
Hypothesis
Siblings of individuals affected by adverse pregnancy outcomes are at increased risk for the same outcomes.
Conclusion
The study found that adverse pregnancy outcomes aggregate in families, suggesting a genetic component.
Supporting Evidence
- Siblings of affected individuals showed significantly higher risks for preterm birth, PPROM, placental abruption, and pre-eclampsia.
- λS values indicated increased sibling risk compared to population prevalence for each outcome.
- The study adjusted for known risk factors, confirming the elevated risk among siblings.
Takeaway
If one baby in a family has problems during pregnancy, their brothers and sisters are more likely to have similar problems too.
Methodology
A retrospective population-based cohort study using a birth certificate database to estimate sibling risk ratios for various adverse pregnancy outcomes.
Potential Biases
Potential underreporting of medical conditions in the database may lead to underestimated risks.
Limitations
Underreporting of complications and limited information on race may bias results; cannot distinguish between full and half siblings.
Participant Demographics
The study included births from 1989 to 1997, primarily white (81.2%) and black (17.3%) populations.
Statistical Information
Confidence Interval
95% CI for λS and sib-sib OR values were reported for each outcome.
Digital Object Identifier (DOI)
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