A Comparison of the effects of preterm birth and institutional deprivation on child temperament

Area of Science:

• Developmental Psychology
• Neuroscience
• Child Psychiatry

Background:

• Preterm birth and early institutional deprivation are known risk factors for neurodevelopmental impairment.
• Shared and distinct neurodevelopmental features are associated with these early life adversities.
• Understanding shared mechanisms is crucial for identifying common pathways and interventions.

Purpose of the Study:

• To directly compare the effects of very preterm birth and early institutional deprivation on temperament profiles in six-year-old children.
• To investigate shared underlying mechanisms between these two risk factors.
• To assess temperament across five dimensions: effortful control, activity, shyness, emotionality, and sociability.

Main Methods:

• Comparison of children born very preterm (<32 weeks gestation) or at very low birthweight (<1500 g) (n=299) with term-born controls (n=311).
• Comparison of children experiencing >6 months of institutional deprivation (n=101) with non-deprived adoptees (n=52).
• Temperament assessment at 6 years using parent reports across five dimensions.

Main Results:

• Both very preterm/very low birthweight and postinstitutionalized children exhibited significantly lower effortful control compared to their respective controls.
• Postinstitutionalized children displayed higher activity levels.
• Very preterm/very low birthweight children showed lower shyness.

Conclusions:

• Preterm birth and early institutionalization are similarly associated with impaired effortful control, suggesting a common pathway for neurodevelopmental vulnerability.
• Temperamental differences, particularly in effortful control, may mediate long-term negative outcomes following early adversity.
• Further research is needed to explore temperamental processes as common mediators of adverse outcomes in children exposed to early life stress.