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Published on: January 7, 2018
Outcomes of small for gestational age infants born at <27 weeks' gestation
Lilia C De Jesus1, Athina Pappas, Seetha Shankaran
1Department of Pediatrics, Wayne State University, Detroit, MI, USA.
Insights
Small for gestational age (SGA) infants born extremely preterm face higher risks of death, growth problems, and neurodevelopmental issues. These findings highlight the critical need for close monitoring and intervention for these vulnerable infants.
Area of Science:
- Neonatalogy
- Perinatal Medicine
- Developmental Pediatrics
Background:
- Infants born small for gestational age (SGA) at extremely preterm gestations (<27 weeks) represent a vulnerable population.
- Understanding the long-term outcomes of SGA infants is crucial for optimizing their care.
- Previous studies have varied in their focus and follow-up durations.
Purpose of the Study:
- To investigate the association between SGA status and adverse outcomes in infants born before 27 weeks gestational age.
- To assess risks for mortality, morbidity, growth, and neurodevelopmental impairment at 18-22 months corrected age.
- To compare outcomes between SGA and non-SGA infants in this extremely preterm cohort.
Main Methods:
- Retrospective cohort study utilizing data from the NICHD Neonatal Research Network.
- Inclusion of infants born <27 weeks gestational age between January 2006 and July 2008.
- Definition of SGA based on birth weight <10th percentile for gestational age (Olsen curves); neurodevelopmental impairment defined by composite criteria.
Main Results:
- The study included 385 SGA infants and 2586 non-SGA infants.
- SGA infants exhibited higher mortality rates and increased likelihood of postnatal growth failure, prolonged mechanical ventilation, and postnatal steroid use.
- SGA status was significantly associated with an increased risk of death or neurodevelopmental impairment (OR, 3.91; P < .001).
Conclusions:
- Small for gestational age status in extremely preterm infants (<27 weeks GA) is linked to adverse outcomes.
- These outcomes include increased mortality, growth failure, and neurodevelopmental impairment at 18-22 months corrected age.
- SGA infants also showed a higher likelihood of requiring postnatal steroid therapy.
Objective:
To determine whether small for gestational age (SGA) infants born at <27 weeks gestational age (GA) are at increased risk for mortality, morbidity, and growth and neurodevelopmental impairment at 18-22 months corrected age.
Study Design:
This was a retrospective cohort study from National Institute of Child Health and Human Development Neonatal Research Network's Generic Database and Follow-Up Studies. Infants born at <27 weeks GA between January 2006 and July 2008 were included. SGA was defined as birth weight <10th percentile for GA based on Olsen growth curves. Infants with birth weight ≥ 10th percentile for GA were classified as non-SGA. Maternal and infant characteristics, neonatal outcomes, and neurodevelopmental data were compared in SGA and non-SGA infants. Neurodevelopmental impairment was defined as any of the following: cognitive score <70 on the Bayley Scales of Infant Development III, moderate or severe cerebral palsy, bilateral hearing loss (with and without amplification), or blindness (bilateral vision <20/200). Logistic regression analysis was applied to evaluate the associations between SGA status and death or neurodevelopmental impairment.
Results:
The SGA group comprised 385 infants; the non-SGA group, 2586 infants. Compared with mothers of non-SGA infants, mothers of SGA infants were more likely to have a high school education, prenatal care, cesarean delivery, pregnancy-induced hypertension, and antenatal corticosteroid exposure. Compared with non-SGA infants, SGA infants had higher mortality and were more likely to have postnatal growth failure, prolonged mechanical ventilation, and postnatal steroid use. SGA status was associated with increased risk of death or neurodevelopmental impairment (OR, 3.91; 95% CI, 2.91-5.25; P < .001).
Conclusion:
SGA status in infants born at <27 weeks GA is associated with an increased likelihood of postnatal steroid use, mortality, growth failure, and neurodevelopmental impairment at 18-22 months corrected age.
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