Summary
Childhood obesity has become increasingly common in recent years and can result from a combination of genetic, biological, behavioral, and environmental factors. It is a major health concern, as children with obesity are at higher risk of developing serious conditions such as type 2 diabetes and heart disease.
Body mass index (BMI) is the most commonly used tool to screen for obesity in children. Because children grow at different rates, BMI is assessed using age- and sex-specific percentiles rather than fixed numbers.
Preventing excessive weight gain during childhood is essential, as obesity is difficult to treat at any age, and children with obesity are more likely to become adults with obesity.
Diagnosis and When to Seek Help
You may want to consult a doctor if your child:
- Has a BMI at or above the 85th percentile for their age and sex (overweight)
- Has a BMI at or above the 95th percentile (obesity)
- Shows signs of weight-related health issues, such as high blood sugar, high blood pressure, or difficulty with physical activity
Doctors use growth charts to assess BMI, taking into account a child’s age, sex, and overall health. In some cases, additional tests may be needed to check for conditions like diabetes or high cholesterol.
Management
The primary approach to managing childhood obesity focuses on healthy lifestyle changes, including:
- Balanced nutrition: Encouraging whole foods, reducing sugary drinks, and practicing portion control
- Regular physical activity: At least 60 minutes of exercise per day, such as walking, biking, or playing sports
- Healthy habits: Getting enough sleep and limiting screen time
For children with severe obesity, additional treatments may be considered:
- Medications: In some cases, weight-loss medications may be prescribed under medical supervision
- Surgery: Metabolic or bariatric surgery is an option for adolescents with severe obesity and related health conditions, but only after other treatments have been attempted
Follow-Up and Monitoring
Managing childhood obesity requires long-term support. Regular check-ups with a healthcare provider can help track progress, provide guidance, and adjust treatment if needed.
By fostering healthy habits early, families can help children achieve and maintain a healthy weight, reducing the risk of long-term health complications. If you are concerned about your child’s weight, consult a healthcare professional for personalized advice.
History and Exam
Key diagnostic factor
- body mass index (BMI) ≥95th percentile
- weight ≥95th percentile for height
Other diagnostic factors
- increased waist-hip ratio
- hypertension
Risk factors
- parents with obesity
- rapid weight gain in infancy
- weight gain in early childhood
- non-Hispanic black or Hispanic ethnicity
Diagnostic Investigations
1st investigations to order
- fasting blood glucose
- serum lipids
- liver function tests
Emerging tests
- DEXA
- bioelectric impedance analysis
- abdominal CT or MRI