This study, authored by Jaekel et al. (2019), examines the relationship between being born very preterm (VP) or with very low birth weight (VLBW), cognitive abilities, and wealth accumulation in adulthood. By tracking participants from birth to 26 years of age, the research provides key insights into how early cognitive abilities influence long-term economic outcomes.
Background
The study focused on a cohort of 193 VP/VLBW individuals and 217 healthy term-born individuals in Bavaria, Germany. Cognitive and mathematical abilities were assessed at the age of eight, and wealth data was collected at age 26. This longitudinal approach allowed researchers to investigate the direct and indirect effects of birth-related risks on adult wealth.
Key Insights
Adult Wealth Outcomes: By age 26, VP/VLBW individuals had accumulated significantly less wealth than their term-born peers.
- Cognitive and Mathematical Differences: VP/VLBW participants demonstrated lower general cognitive and mathematical abilities compared to their healthy term-born counterparts.
- Adult Wealth Outcomes: By age 26, VP/VLBW individuals had accumulated significantly less wealth than their term-born peers.
- Impact of General Cognitive Abilities: Structural equation modeling revealed that general cognitive abilities, rather than mathematical skills, were the stronger predictor of wealth accumulation in adulthood.
Significance
The findings highlight the importance of supporting general cognitive development in children born VP/VLBW. By focusing interventions on overall cognitive abilities rather than solely on specific skills like mathematics, healthcare and educational systems can better address the long-term challenges faced by individuals at high neonatal risk. This approach could lead to improved socioeconomic outcomes and reduced disparities.
Future Directions
Future research could explore the specific mechanisms linking general cognitive abilities to wealth accumulation and identify ways to enhance early cognitive development. Studies that include more diverse populations and consider additional socioeconomic factors would also help strengthen the generalizability of these findings.
Conclusion
This research underscores the significant role of general cognitive abilities in shaping long-term economic outcomes for individuals born VP/VLBW. By addressing the challenges these individuals face early in life, targeted interventions can contribute to more equitable opportunities and improved quality of life in adulthood.
Reference
Jaekel, J., Baumann, N., Bartmann, P., & Wolke, D. (2019). General cognitive but not mathematic abilities predict very preterm and healthy term-born adults’ wealth. PLOS ONE, 14(3), e0212789. https://doi.org/10.1371/journal.pone.0212789
Understanding Preterm Cognitive Development
Preterm birth — defined as birth before 37 weeks of gestation — affects approximately 10% of all births worldwide, making it one of the most common risk factors for cognitive development differences. The brain undergoes critical growth during the third trimester, including myelination of neural pathways, synaptogenesis, and cortical folding. When birth occurs before these processes complete, the resulting developmental trajectory can differ in measurable ways.
Key Takeaways
- Programs like the Perry Preschool Project and Abecedarian Project demonstrated IQ gains of 5-15 points, with lasting effects on educational attainment and life outcomes.
- Genetic factors account for roughly 50% of variation in cognitive ability, with environmental factors accounting for the remainder, especially in early childhood.
- By tracking participants from birth to 26 years of age, the research provides key insights into how early cognitive abilities influence long-term economic outcomes.
- Adult Wealth Outcomes: By age 26, VP/VLBW individuals had accumulated significantly less wealth than their term-born peers.
Research consistently shows that the degree of prematurity matters: extremely preterm infants (born before 28 weeks) face the greatest cognitive challenges, while late preterm infants (34-36 weeks) often catch up to their full-term peers by school age. However, “catching up” in average scores does not mean individual outcomes are predetermined — environmental enrichment, responsive caregiving, and early intervention programs have been shown to significantly narrow developmental gaps.
Modern neonatal intensive care has dramatically improved survival rates, shifting research focus from mortality to long-term quality of life and cognitive outcomes. Longitudinal studies following preterm cohorts into adulthood reveal that while group-level differences persist, individual variation is substantial, and many preterm-born adults achieve educational and professional success comparable to their full-term peers.
Practical Implications for Parents and Clinicians
For parents of preterm infants, these findings offer both realistic expectations and grounds for optimism. While group-level statistics show average cognitive differences, individual trajectories vary enormously. Key protective factors include kangaroo care (skin-to-skin contact), responsive parenting, early enrollment in developmental follow-up programs, and creating language-rich home environments. Clinicians should provide balanced counseling that acknowledges risks without creating self-fulfilling prophecies of poor outcomes.
Early intervention services — typically available through state early intervention programs for children birth to age 3 — have demonstrated effectiveness in narrowing cognitive gaps. These services may include speech-language therapy, occupational therapy, developmental play-based interventions, and parent coaching. The earlier these services begin, the greater their potential impact, as neural plasticity is highest in the first years of life.
Frequently Asked Questions
What factors most influence a child’s cognitive development?
Research identifies several key factors: prenatal nutrition, birth weight, breastfeeding duration, early caregiving quality, environmental stimulation, socioeconomic status, and exposure to toxins. Genetic factors account for roughly 50% of variation in cognitive ability, with environmental factors accounting for the remainder, especially in early childhood.
At what age is cognitive ability most malleable?
The first 1,000 days (from conception to age 2) represent the most sensitive period for brain development. During this time, the brain forms over one million neural connections per second. However, cognitive development continues to be influenced by environment throughout childhood and adolescence, with diminishing but still meaningful plasticity.
Can early interventions improve cognitive outcomes?
Yes, high-quality early interventions can significantly improve cognitive outcomes, particularly for children from disadvantaged backgrounds. Programs like the Perry Preschool Project and Abecedarian Project demonstrated IQ gains of 5-15 points, with lasting effects on educational attainment and life outcomes.
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Read more →Why is background important?
The study focused on a cohort of 193 VP/VLBW individuals and 217 healthy term-born individuals in Bavaria, Germany. Cognitive and mathematical abilities were assessed at the age of eight, and wealth data was collected at age 26. This longitudinal approach allowed researchers to investigate the direct and indirect effects of birth-related risks on adult wealth.
How does key insights work in practice?
Cognitive and Mathematical Differences: VP/VLBW participants demonstrated lower general cognitive and mathematical abilities compared to their healthy term-born counterparts. Adult Wealth Outcomes: By age 26, VP/VLBW individuals had accumulated significantly less wealth than their term-born peers. Impact of General Cognitive Abilities: Structural equation modeling revealed that general cognitive abilities, rather than mathematical
