A comprehensive national study released on October 14 has revealed an alarming public health trend in Bangladesh, showing that children from wealthy families exhibit higher concentrations of lead in their blood compared to those from low-income households. The cross-sectional analysis found that 51.9 percent of children belonging to the wealthiest 20 percent of families have elevated blood lead levels, whereas the rate stands at 30.2 percent among the poorest 20 percent of households. Overall, the research indicates that 38.5 percent of children aged 12 to 59 months across the country possess dangerous levels of lead in their blood, translating to nearly 39 out of every 100 young children.
59 Months in Bangladesh: A National Cross-Sectional Analysis of MICS 2025, was authored by Syed Towsik Hossain and Md Imam Hasan, researchers at the Institute of Health Economics of the University of Dhaka. Published on the online preprint platform MedRxiv, the study analyzed data from the Multiple Indicator Cluster Survey (MICS) 2025, conducted by the Bangladesh Bureau of Statistics (BBS) with technical assistance from UNICEF. This nationwide survey evaluated health, nutrition, education, and environmental hazards among women and children, marking the first time heavy metal concentrations, including lead, were tested in blood samples of under-five children at a national scale.
Evaluating 9,717 children with complete socioeconomic and blood test records out of 18,905 participants aged 12 to 59 months, the investigators defined elevated blood lead as 5 micrograms or more per deciliter of blood. The statistical breakdown demonstrated a direct positive correlation between household wealth and lead exposure, maintaining that as family wealth rankings increased, the proportion of children with high blood lead levels rose correspondingly, even after adjusting for maternal education, housing conditions, and regional factors.
Eminent pediatric specialists in Bangladesh have expressed grave concern over these findings, noting a recent surge in young patients suffering from neurological development disorders. Public health experts reiterate that no safe threshold for blood lead in children exists, as heavy metal toxicity severely impairs brain development, nervous system functions, intellectual capacity, attention span, learning capabilities, and behavioral patterns. Because such neurological damage frequently manifests without immediate physical symptoms, affected children may appear outwardly healthy while enduring suppressed cognitive growth.
The release of these findings coincides with the 14th International Lead Poisoning Prevention Week, observed from October 18 to October 24 under the auspices of the World Health Organization (WHO) with the theme From Diagnosis to Prevention. Previous domestic studies have similarly established a direct link between elevated blood lead levels in children and diminished performance in cognitive development assessments, reinforcing the urgent necessity for targeted environmental and public health interventions across the nation.
