Health Records Reveal How Congenital Conditions and Poverty Shape School Success in Wales

Children born with major congenital anomalies in Wales are substantially less likely to reach the national academic milestones that open doors to further education and professional careers, but the largest driver of lost attainment is not the medical condition itself. It is poverty. A population-based data linkage study published in PLOS Medicine has connected routinely collected health and education records for hundreds of thousands of children born in Wales between 1998 and 2007, following them through school until the end of 2019, and the resulting picture is one of compounding disadvantage in which socioeconomic deprivation, chronic ill health, and special educational needs interact to determine who crosses the threshold of national academic standards.

The research team, led by Ieuan Scanlon and colleagues from institutions including Swansea University and Queen Mary University of London, used the Secure Anonymised Information Linkage Databank, a privacy-preserving repository that allows accredited researchers to join together anonymised electronic records from the National Health Service and the education system. By linking maternity, hospital, prescribing, and school assessment data at the level of the individual child, the investigators could follow entire birth cohorts rather than small clinical samples, giving the study statistical power that case series and hospital-based surveys cannot match. The cohort covered children born in a twelve-year window and tracked their performance at two critical checkpoints: key stage 2 assessments at age 11 and key stage 4 examinations at age 16.

The headline numbers are stark. At age 11, 81.9 percent of children with a major congenital anomaly reached the established standards at key stage 2, compared with 93.8 percent of children without such anomalies. By age 16, only 46.8 percent of affected children achieved five General Certificates of Secondary Education at grades C to A*, including English or Welsh, mathematics, and science, the combination often required for entry to professional courses, against 56.1 percent of unaffected peers. In unadjusted logistic regression models, having a major congenital anomaly was associated with roughly a threefold reduction in the odds of reaching the age-11 standard and about a 30 percent reduction in the odds of achieving the GCSE benchmark.

Yet those raw figures conceal a more complicated causal landscape. When the analysts adjusted for maternal and child socioeconomic deprivation, medicated comorbidities, hospital admissions, gestational length, sex, year of birth, and, crucially, special educational needs provision, the gap narrowed dramatically. At key stage 2 the adjusted odds ratio softened to 0.72, and at key stage 4 it fell to 0.93, a value whose 95 percent confidence interval of 0.87 to 1.00 brushes against statistical equivalence. In other words, once the social and educational circumstances surrounding a child with a congenital anomaly are properly accounted for, the anomaly itself explains only a small residual share of the attainment deficit. The burden is carried by the conditions that cluster around it.

Deprivation emerges from the data as the dominant force. Using the maternal Welsh Index of Multiple Deprivation measured at birth, the researchers divided the cohort into quintiles from most to least deprived. Among children in the most deprived quintile, 29.7 percent of those with major congenital anomalies and 38.4 percent of unaffected children achieved five GCSEs at grades C to A* with English or Welsh, mathematics, and science. In the least deprived quintile, those figures rose to 67.6 percent and 75.0 percent respectively. The gradient is steep and monotonic: every step up the deprivation ladder costs children, with or without congenital conditions, a substantial fraction of their chance of academic success, and the penalty compounds when congenital anomalies and poverty co-occur.

The study also quantified the independent contributions of specific health and educational factors to GCSE outcomes. The strongest association by far was with a statement of special educational needs, the formal designation that triggers maximum statutory support, which carried an adjusted odds ratio of 0.07, meaning children with such statements were more than ten times less likely to hit the benchmark even after adjustment. Eligibility for Free School Meals, a widely used proxy for household poverty, carried an adjusted odds ratio of 0.39, and epilepsy, one of the medicated comorbidities captured in the prescribing records, carried an adjusted odds ratio of 0.60. These three factors, SEN statements, FSM eligibility, and epilepsy, towered over the residual effect of congenital anomalies themselves in the adjusted models.

At the intersection of these risks, outcomes collapse. Children who had a major congenital anomaly, were receiving the highest level of special educational needs support, and were eligible for Free School Meals were the least likely of any group in the cohort to reach national academic standards: just 5 out of 192, or 2.6 percent, obtained five GCSEs at grades C to A* with the required core subjects. Among comparable children not eligible for Free School Meals, 37 out of 354, or 10.4 percent, achieved the same benchmark. The authors conclude that children living in the most deprived quintiles, or eligible for Free School Meals, who also carry the ill-health burden of major congenital anomalies or epilepsy, are two to four times less likely to attain these standards than their more advantaged peers.

There is a hopeful thread woven through the findings. Many children with major congenital anomalies from the least deprived quintiles did reach national academic standards, including the full GCSE benchmark, demonstrating that a congenital diagnosis is not a fixed ceiling on achievement. Moreover, the narrowing of disparities in adjusted analyses, particularly once special educational needs provision was accounted for, suggests that formal educational support mitigates part of the association between disadvantage and attainment. Where SEN systems intervene, the penalty attached to congenital anomalies and associated ill health shrinks, implying that early identification and adequate resourcing of special educational needs could function as a lever for improving life chances, not merely a bureaucratic label.

The methodological strengths of the study deserve emphasis because they underpin the credibility of these conclusions. Retrospective cohort designs using linked administrative data avoid the selection biases that plague clinic-based studies, capture children who might never present to specialist services, and permit adjustment for a rich set of confounders spanning gestation, sex, birth year, hospitalisation history, and pharmacologically treated comorbidities. The SAIL Databank infrastructure, which anonymises and securely links records across health and education domains, represents a model that other nations with fragmented data systems have struggled to replicate, and the Welsh approach demonstrates what whole-population evidence can reveal about the social determinants of child development.

The investigators are candid about limitations. Data were absent for 15 to 18 percent of children, mainly those educated outside mainstream state-funded schools, a group likely to include some of the most vulnerable pupils, and information on some comorbidities was incomplete. The findings describe Wales in a specific birth cohort and may not generalise to other countries with different education systems, examination structures, or welfare arrangements. Even so, the central message travels well beyond the Welsh border: educational attainment at 16 is shaped powerfully by the interaction of poverty, chronic illness, and access to special educational support, and children who carry all three disadvantages simultaneously face odds so steep that only a small fraction reach the qualifications on which professional futures depend. The study argues, implicitly but forcefully, that health policy and education policy cannot be designed in isolation from one another.

Subject of Research: Associations of major congenital anomalies, long-term health conditions, and socioeconomic deprivation with educational attainment in Wales: A population-based data linkage study

Article Title: Associations of major congenital anomalies, long-term health conditions, and socioeconomic deprivation with educational attainment in Wales: A population-based data linkage study

Article References: Scanlon, I., Rawlings, A., Tucker, D., Thayer, D. S., Evans, H. T., Given, J., Jones, S., Loane, M., Morgan, C., Morris, J. K., & Jordan, S. (2026). Associations of major congenital anomalies, long-term health conditions, and socioeconomic deprivation with educational attainment in Wales: A population-based data linkage study. PLOS Medicine, 23(10), e1005050. https://doi.org/10.1371/journal.pmed.1005050

Image Credits: AI Generated

DOI: 10.1371/journal.pmed.1005050

Keywords: Associations, major, congenital, anomalies, long-term, health, conditions, socioeconomic, deprivation, educational, attainment, Wales