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Updated: Jul 3, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Determining the proportion of children too heavy for age-appropriate car seats in a practice-based research network
William T Basco1, Paul J Hletko, Lynn West
1South Carolina Pediatric Practice Research Network, the Division of General Pediatrics, Medical University of South Carolina, Charleston, 29425, USA. bascob@musc.edu
Insights
Many young children exceed weight limits for child safety seats (CSS), potentially violating traffic laws. This study highlights a significant gap in compliance due to increasing childhood weight.
Area of Science:
- Pediatric health
- Traffic safety research
- Public health policy
Background:
- Child safety seat (CSS) use is critical for preventing injuries.
- Understanding the impact of childhood weight trends on CSS compliance is needed.
Purpose of the Study:
- To determine the percentage of child passengers exceeding weight limits for CSS use.
- To assess potential non-compliance with state CSS laws due to child weight.
Main Methods:
- Data collected from 717 children under 6 years old across 6 practices.
- Calculated percentages of children exceeding specific weight cutoffs (20, 40, 80 lbs).
- Analyzed data based on age groups and racial demographics.
Main Results:
- 16.4% of infants (<12 months) exceeded the 20 lbs weight limit.
- 20% of children aged 12 months to <6 years exceeded the 40 lbs weight limit.
- One child exceeded the 80 lbs weight limit; no significant racial or practice-based differences found.
Conclusions:
- A substantial proportion of children in the study were too heavy for legal CSS use.
- Childhood weight trends pose a challenge to maintaining compliance with traffic safety regulations.
- Further research is needed to address this public health issue.
Introduction:
more information is needed on how trends in childhood weight might influence legally compliant child safety seat (CSS) use.
Objective:
to determine the proportion of child passengers who cannot comply with one state's CSS law because of weight.
Method:
6 practices in a practice-based research network provided data on patient demographics, heights, and weights. The authors calculated percentages of children above age-appropriate CSS weight cutoffs (20, 40, and 80 pounds, respectively) for the cohort below 6 years.
Results:
there were 717 participants below 6 years of age. Among all infants (<12 months), 16.4% weighed >20 pounds. Among children 12 months to <6 years old, 20% weighed >40 pounds. One weighed >80 pounds. There were no significant differences among racial groups. There was wide variation among practices, but differences did not achieve statistical significance.
Conclusion:
many children in this diverse cohort were too heavy to be compliant with the state CSS law.
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