Weight Centile Assessment
Based on UK WHO growth charts, a 13-year-old girl weighing 74.95 kg is significantly above the 95th centile (approximately 65-70 kg represents the 95th centile for this age), indicating obesity. 1
Growth Chart Framework
UK WHO growth charts should be used for this adolescent, as they extend through age 20 years and are the recommended standard for children beyond 59 months of age. 1
The CDC growth charts are also appropriate for children aged 24 months and older, providing continuity through age 19 years. 2
Specific Weight Assessment
Her weight of 74.95 kg places her substantially above the 95th centile, which is a critical threshold for identifying children whose growth patterns may indicate adverse health conditions. 1
For context, the 95th centile for a 13-year-old girl is approximately 65-70 kg, meaning her actual weight exceeds this by roughly 5-10 kg. 1
Values at or above the 97.7th percentile (labeled as 95th percentile on standard charts) are specifically recommended for identifying children requiring clinical attention. 2
Clinical Significance
The discrepancy between her height centile (50th-75th) and weight centile (>95th) indicates disproportionate weight gain relative to height, which is clinically significant. 1
Her calculated BMI of 28.2 kg/m² (74.95 kg ÷ 1.63² m) is above the 95th centile for age, meeting the definition of obesity in adolescents. 1
Monitoring Considerations
Serial measurements over time provide more valuable information than single measurements for assessing growth trajectory and response to interventions. 1
Growth velocity and previous growth trajectory should be evaluated alongside current measurements to understand the pattern of weight gain. 1
Regular monitoring every 6-12 months is recommended to track BMI changes and ensure appropriate growth trajectory maintenance. 1