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Published on: January 7, 2018
Maternal and pregnancy-related factors associated with developmental delay in moderately preterm-born children
Jorien M Kerstjens1, Andrea F de Winter, Krystyna M Sollie
1Division of Neonatology, Beatrix Children's Hospital, and the Department of Health Sciences and the Division of Obstetrics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Insights
Maternal obesity, small-for-gestational-age (SGA) birth, multiple births, and male sex are linked to developmental delays in moderately preterm children. Addressing these factors may improve developmental outcomes.
Area of Science:
- Pediatric developmental neuroscience
- Maternal-fetal medicine
- Public health
Background:
- Moderately preterm birth (32-35 weeks gestation) is associated with increased risks of developmental delay.
- Identifying pre-existing maternal and pregnancy-related factors is crucial for early intervention.
Purpose of the Study:
- To investigate the association between maternal and pregnancy-related factors and developmental delay in early childhood among moderately preterm-born children.
Main Methods:
- Development was assessed using the Ages and Stages Questionnaire at 43-49 months in 834 moderately preterm children.
- Data on maternal, fetal, and delivery factors were collected.
- Adjusted odds ratios and attributable risks were calculated.
Main Results:
- Small-for-gestational-age (SGA) was associated with a 14.2% attributable risk for developmental delay.
- Maternal prepregnancy obesity showed a 10.5% attributable risk.
- Multiple pregnancy and male sex were also significantly associated with increased risk.
Conclusions:
- SGA, maternal obesity, multiple birth, and male sex are key risk factors for developmental delay in moderately preterm children.
- Preventing intrauterine growth restriction, promoting preconception weight loss, and reducing multiple births may improve outcomes.
Objective:
To estimate the association between pre-existing maternal and pregnancy-related factors and developmental delay in early childhood in moderately preterm-born children.
Methods:
We measured development with the Ages and Stages Questionnaire at age 43-49 months in 834 moderately preterm-born (between 32 0/7 and 35 6/7 weeks of gestation) children born in 2002-2003. We obtained data on preexisting maternal, maternal pregnancy-related, fetal, and delivery-related factors. We calculated odds ratios (ORs) and 95% confidence intervals (CIs) and attributable risks for developmental delay adjusted for sociodemographic and lifestyle variables.
Results:
Attributable risk for developmental delay for small-for-gestational-age (SGA, as a proxy for intrauterine growth restriction [IUGR]) was 14.2% (SGA 21.9%, no SGA 7.7%, P<.05, adjusted OR 2.75, CI 1.25-6.08), for preexisting maternal obesity 10.5% (obesity 18.0%, no obesity 7.5%, P<.01, adjusted OR 2.73, CI 1.35-5.52), for multiple pregnancy 4.2% (multiple 12.0%, singleton 7.8%, P<.05, adjusted OR 1.86, CI 1.02-3.42), and for male sex 9.3% (male 13.0%, female 3.8%, P<.001, adjusted OR 4.20, CI 2.09-8.46). No other preexisting or pregnancy-related maternal factors or any delivery-related factors were associated with increased risk of developmental delay.
Conclusions:
Of all preexisting maternal and pregnancy-related factors studied, SGA, maternal prepregnancy obesity, being one of a multiple, and male sex were associated with the risk of developmental delay in early childhood after moderately preterm birth. Reinforced focus on prevention of IUGR, preconception lifestyle interventions aiming at weight reduction in fertile women, and reinforced efforts to reduce rates of multiple pregnancies in assisted reproduction may all contribute toward more favorable developmental outcomes in moderately preterm-born children.
Level Of Evidence:
II.
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