What is the centile for a 15-year-old boy with a weight (WT) of 64 kg and a height (HT) of 159.9 cm according to the UK World Health Organization (WHO) growth charts?

Centile Assessment for 15-Year-Old Boy with Weight 64 kg and Height 159.9 cm

Based on UK WHO growth charts, a 15-year-old boy with weight of 64 kg and height of 159.9 cm would be approximately at the 75th centile for weight and between the 25th-50th centile for height. 1

Height Assessment

• The height of 159.9 cm for a 15-year-old boy falls between the 25th and 50th centile on UK WHO growth charts 1
• This height is within the normal range but slightly below the median height for boys of this age 1
• For comparison, the median height (50th centile) for 15-year-old boys is approximately 163-165 cm according to WHO growth standards 2

Weight Assessment

• The weight of 64 kg for a 15-year-old boy is approximately at the 75th centile on UK WHO growth charts 1
• This weight is above the median but still within the normal range for boys of this age 1
• The median weight for 15-year-old boys is approximately 55-58 kg according to WHO growth standards 3

BMI Assessment

• Calculating BMI: 64 kg ÷ (1.599 m)² = 25.0 kg/m² 1
• This BMI value falls between the 85th and 91st centiles for a 15-year-old boy, indicating that he is in the overweight category 2
• At 19 years, a BMI of 25.0 kg/m² corresponds to the +1 standard deviation mark, which is equivalent to the adult overweight threshold 2

Clinical Interpretation

• The discrepancy between height and weight centiles (height at 25th-50th centile and weight at 75th centile) indicates disproportionate weight relative to height 1
• This growth pattern suggests that the boy has a higher than average body mass for his height 2
• Regular monitoring of growth parameters is essential to track changes in BMI over time 1

Growth Trajectory Considerations

• Growth velocity is as important as absolute measurements; serial measurements provide more valuable information about growth patterns 3
• For 15-year-old boys, expected additional height growth is approximately 9-10 cm until final adult height is reached 3
• Parental heights should be considered when interpreting growth charts to account for genetic potential 1

Comparison with International Standards

• UK WHO growth charts are aligned with WHO Child Growth Standards and are appropriate for assessing growth in this age group 4
• There are some differences between growth charts from different countries, with variations in median heights and weights at different ages 5