Correlation between lead exposure and cognitive function in 12-year-old children: a systematic review and meta-analysis

Lead exposure as a toxic material especially in children can be recognized as a harmful factor for cognitive function system. This meta-analysis was conducted to estimate the lead exposure effect on cognitive function among 6979 children less than 12 years. The 16 studies were divided into two clust...

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Bibliographic Details
Published in:Environmental science and pollution research international Vol. 28; no. 32; pp. 43064 - 43073
Main Authors: Heidari, Serve, Mostafaei, Shayan, Razazian, Nazanin, Rajati, Mojgan, Saeedi, Anahita, Rajati, Fatemeh
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2021
Springer Nature B.V
Subjects:
Algorithms
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Child
Children
Cluster analysis
Clustering
Cognition
Cognitive ability
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Exposure
Humans
Lead
Lead poisoning
Meta-analysis
Review Article
Subgroups
systematic review
toxic substances
Vector quantization
Waste Water Technology
Water Management
Water Pollution Control
Lead
Systematic review
Cognition
Correlation of data
Child
Meta-analysis
ISSN:0944-1344, 1614-7499, 1614-7499
Online Access:Get full text
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Summary:Lead exposure as a toxic material especially in children can be recognized as a harmful factor for cognitive function system. This meta-analysis was conducted to estimate the lead exposure effect on cognitive function among 6979 children less than 12 years. The 16 studies were divided into two clusters according to “duration of exposure” and “dose” using k-means partitioning clustering algorithm. Then, subgroup analysis has been performed based on the clustered studies. According to the results of the k-means clustering, dose and duration of exposure were significant factors between all considered variables. A stronger negative significant pooled correlation was observed in higher dose and duration cluster in comparison with another cluster including lower dose and duration ( r = − 0.29, P -value < 0.001 vs . r = − 0.08, P -value < 0.001). Overall, a negative significant correlation was observed between lead exposure and cognitive function test score ( r = − 0.22, P -value < 0.001). This study confirms the negative effect of lead on cognitive function in children, but needed further investigations to achieve the safe dose and duration of the lead exposure.
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ISSN:0944-1344
1614-7499
1614-7499
DOI:10.1007/s11356-021-14712-w