Related Experiment Videos
Lead exposure and motor functioning in 4(1/2)-year-old children: the Yugoslavia prospective study
G A Wasserman1, A Musabegovic, X Liu
1Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
Insights
Early lead exposure is linked to poorer fine and visual-motor skills in children, even after accounting for other factors. Gross motor skills remained unaffected by blood lead levels.
Area of Science:
- Environmental Health
- Developmental Pediatrics
- Toxicology
Background:
- Lead exposure is a significant public health concern, particularly for children's neurodevelopment.
- Early childhood is a critical period for motor skill acquisition.
- Understanding environmental influences on motor development is crucial for early intervention.
Purpose of the Study:
- To examine the relationship between early lead exposure and various aspects of motor development in young children.
- To determine if associations between lead exposure and motor function persist after controlling for confounding variables.
Main Methods:
- Longitudinal study of 283 children from pregnancy through 54 months of age, recruited from a lead-exposed smelter town and a control town.
- Standardized motor function assessments at 54 months: Bruininks-Oseretsky Test of Motor Proficiency and Beery Developmental Test of Visual-Motor Integration.
- Blood lead concentration (BPb) measured serially and averaged through 54 months; anthropometric and home environment factors also assessed.
Main Results:
- Home environment factors (e.g., HOME scale, parental education) and anthropometrics explained 10-18% of motor functioning variance.
- Higher average blood lead levels (BPb) were significantly associated with poorer fine motor and visual-motor skills.
- No significant association was found between BPb and gross motor coordination.
Conclusions:
- Modest negative associations exist between early lead exposure and fine and visual-motor skills.
- These associations remain evident even after adjusting for socioeconomic and home environment factors.
- Gross motor development appears unaffected by early lead exposure in this cohort.
Objective:
To investigate associations between lead exposure and early motor development.
Study Design:
We conducted standardized assessments of motor function (Bruininks-Oseretsky Test of Motor Proficiency and Beery Developmental Test of Visual-Motor Integration) at age 54 months in 283 children whose mothers were recruited in pregnancy from a smelter town and a non-lead-exposed town in Yugoslavia and who have been monitored twice yearly since birth. Blood lead concentration (BPb) was summarized in a measure reflecting the average of the child's semiannual serial log BPbs through 54 months.
Results:
Multiple regression showed that taken together, anthropometric measures (birth weight, body mass index) and markers of a stimulating and organized home life (HOME scale, parental education and intelligence, availability of siblings) explained a significant 10% to 18% of the variance in motor functioning. Beyond these contributions, BPb was significantly associated with poorer fine motor and visual motor function but was unrelated to gross motor coordination.
Conclusions:
Modest associations between early lead exposure and fine motor and visual motor functioning appear even after statistical adjustment is done for other contributors to motor development. Associations with BPb are specific to these areas of motor skill; gross motor development was unaffected.