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Updated: May 20, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Associations between childhood obesity and upper and lower extremity injuries
Annette L Adams1, Jeffrey I Kessler, Krikor Deramerian
1Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, California, USA. annette.l.adams@kp.org
Insights
Children with higher body mass index have increased odds of lower extremity injuries and pain. Injury prevention strategies are recommended for these at-risk children.
Area of Science:
- Pediatric Orthopedics
- Sports Medicine
- Public Health
Background:
- Childhood obesity is a growing public health concern.
- Musculoskeletal injuries and pain are common in children.
- The relationship between excess weight and extremity injuries in pediatric populations requires further investigation.
Purpose of the Study:
- To determine the association between body mass index (BMI) categories and the risk of extremity musculoskeletal injuries and pain in children.
- To analyze age-specific associations between obesity and these conditions.
Main Methods:
- Cross-sectional study utilizing electronic medical records of 913,178 children aged 2-19 years.
- Patients categorized into underweight, normal weight, overweight, or moderately/extremely obese groups.
- Multivariable logistic regression analysis to assess associations between weight class and diagnoses of upper or lower extremity fractures, sprains, dislocations, and pain.
Main Results:
- Overweight, moderately obese, and extremely obese children demonstrated significantly higher odds of lower extremity injuries and pain compared to normal-weight children.
- Associations remained significant after adjusting for sex, age, race/ethnicity, and insurance status.
- No consistent association was found between BMI and upper extremity injuries or pain.
Conclusions:
- Increased body mass index is linked to a greater likelihood of lower extremity injuries and pain in children.
- Despite the increased injury risk, the benefits of physical activity in children often outweigh the risks.
- Targeted injury prevention strategies are crucial for children at higher risk of lower extremity injuries due to their weight status.
Objectives:
To estimate the overall and age-specific associations between obesity and extremity musculoskeletal injuries and pain in children.
Methods:
This cross-sectional study used information from electronic medical records of 913178 patients aged 2-19 years enrolled in an integrated health plan in the period 2007-2009. Children were classified as underweight, normal weight, overweight, or moderately/extremely obese and, using multivariable logistic regression methods, the associations between weight class and diagnosis of upper or lower extremity fractures, sprains, dislocations and pain were calculated.
Results:
Overweight (OR 1.18, 95% CI 1.15 to 1.20), moderately obese (OR 1.24, 95% CI 1.20 to 1.27) and extremely obese (OR 1.34, 95% CI 1.30 to 1.39) children had statistically significantly higher odds of lower extremity injuries/pain compared to normal weight, adjusted for sex, age, race/ethnicity and insurance status. Age-stratified analyses yielded similar results. No consistent association was observed between body mass index and injuries/pain of the upper extremities.
Conclusions:
Greater body mass index is associated with increased odds of lower extremity injuries and pain issues. Because the benefits of physical activity may still outweigh the risk of injury, attention should be paid to injury prevention strategies for these children at greater risk for lower extremity injuries.
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