Preterm Birth and Low Birth Weight Linked to Lifelong Cognitive Disadvantages: JAMA

An umbrella review and meta-analysis published in the Journal of the American Medical Association found that preterm birth and low birth weight are associated with persistent cognitive and educational disadvantages throughout life. These findings highlight the need for early identification and long-term monitoring to guide healthcare and educational support strategies.

Recent advances in perinatal care have dramatically improved survival rates for babies born preterm or with low birth weight. Thus, this study synthesized evidence from 40 systematic reviews, including 22 meta-analyses, drawing on hundreds of primary studies across major research databases up to April 2025.

This research reanalyzed 788 effect estimates to better understand how being born before 37 weeks’ gestation or weighing less than 2500 grams affects long-term intellectual and educational performance.

The findings reveal that individuals born preterm or with low birth weight tend to score significantly lower on measures of general cognitive ability. On average, intelligence quotient (IQ) scores were notably reduced when compared to peers born at full term and normal weight. Beyond IQ, the analysis found substantial deficits in dedicated academic domains, including reading, mathematics, and spelling.

Children born under these conditions were more likely to require special educational support services, which pointed to increased learning needs within school systems. While data on broader outcomes such as total years of schooling and associated educational costs were more limited, available evidence suggests lower rates of school completion and higher overall expenses tied to additional support.

This research points that the degree of impact varies depending on how early a child is born or how low their birth weight is. The earlier the gestational age and the lower the birth weight, the stronger the association with poorer outcomes. Some of these differences appear to reduce during adolescence, though they do not disappear entirely and can still be observed into adult life.

Overall, these findings illuminate a critical gap between medical success and developmental equity. While neonatal care has advanced to save more lives, the long-term support systems for these individuals need more probing. The results point to the need for early identification of at-risk children and sustained monitoring throughout their development.

Schools and governments may need to allocate more targeted support to accommodate the higher likelihood of learning difficulties in this population. Early interventions, tailored educational programs, and long-term follow-up could play key roles in narrowing these gaps.

Source:

Hu, M., Truong, T., Zhu, S., Vidiella-Martin, J., Johnson, S., Quigley, M. A., & Petrou, S. (2026). Cognitive and educational outcomes after preterm birth or low birth weight: An umbrella review and meta-analysis: An umbrella review and meta-analysis. JAMA Pediatrics. https://doi.org/10.1001/jamapediatrics.2026.0533