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Explaining differences in birth outcomes in relation to maternal age: the Generation R Study.
R Bakker1, E A P Steegers, A A Biharie
1The Generation R Study Group, Erasmus Medical Centre, Rotterdam, the Netherlands.
BJOG : an International Journal of Obstetrics and Gynaecology
|January 20, 2011
Summary
Younger mothers face higher risks of small-for-gestational-age (SGA) babies, while older mothers are more prone to large-for-gestational-age (LGA) babies. These associations persist even after accounting for lifestyle and sociodemographic factors.
Area of Science:
- Reproductive Health
- Perinatal Epidemiology
- Maternal-Fetal Medicine
Background:
- Maternal age is a critical factor influencing pregnancy outcomes.
- Sociodemographic and lifestyle factors may mediate the relationship between maternal age and birth outcomes.
- Understanding these associations is crucial for targeted prenatal care.
Purpose of the Study:
- To investigate the association between maternal age and various birth outcomes.
- To determine the extent to which sociodemographic and lifestyle factors explain these associations.
Main Methods:
- A population-based prospective cohort study involving 8568 mothers and their children.
- Maternal age, sociodemographic data, and lifestyle factors were collected via questionnaires and hospital records.
- Multivariate regression analyses were employed to assess associations with birthweight, preterm delivery, SGA, and LGA.
Main Results:
- Younger mothers (<20 years) showed an increased risk of small-for-gestational-age (SGA) babies, which diminished after adjusting for confounders.
- Older mothers (>40 years) exhibited an increased risk of large-for-gestational-age (LGA) babies.
- The observed associations between maternal age and LGA were not fully explained by the studied determinants.
Conclusions:
- Maternal age is independently associated with specific adverse birth outcomes: SGA in younger mothers and LGA in older mothers.
- Sociodemographic and lifestyle factors do not fully account for the observed age-related risks in birth outcomes.
- These findings highlight the complex interplay of factors affecting fetal growth and development across different maternal age groups.
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