Abstract
Lead exposure is a severe public health issue that can adversely affect children’s neurocognitive development. A semi-urban community in Mexico has been exposed to lead from food cooked in glazed clay pots. A cognitive intervention was conducted from 2015 to 2016 to minimize this negative impact. This intervention aimed to improve the neurocognitive development of the affected children.
Methods:
A quasi-experimental study with a control group was conducted in children aged 7 to 12 years from 2 communities in Morelos, Mexico. Blood lead levels were determined, and the neurocognitive function was assessed pre- and postintervention with the Wechsler Intelligence Scale for Children and Children’s Auditory Verbal Learning Test-2. A cognitive intervention was conducted at the school. The difference-in-differences method adjusted for variables known as priori and evaluated the impact of cognitive intervention.
Results:
The differences-in-differences models indicated a significant average increase in scores on the Verbal Comprehension Index (9.58 points), Processing Speed Index (5.33 points), intelligence quotient (5.63 points) level of learning (7.66 points), interference trial (10.12 points), immediate memory span (7.98 points), and recognition accuracy (1.18 points) subtests after the cognitive intervention.
Conclusion:
The results suggest that cognitive intervention improves neurocognitive development in schoolchildren exposed to Pb.
Publisher
Ovid Technologies (Wolters Kluwer Health)
Reference44 articles.
1. Los tóxicos ambientales y su impacto en la salud de los niños;Zayas Mujica;Rev Cuba Pediatría,2007
2. A review of the field on children’s exposure to environmental contaminants: a risk assessment approach;Ferguson;Int J Environ Res Public Health,2017
3. Toxicity of lead: a review with recent updates;Flora;Interdiscip Toxicol,2012
4. Cognitive deficits associated with blood lead concentrations <10 microg/dL in US children and adolescents;Lanphear;Public Health Rep Wash DC 1974,2000
5. Blood lead levels and specific attention effects in young children;Chiodo;Neurotoxicol Teratol,2007