BMI Calculation for Filipino Child
The BMI for this Filipino child is 16.1 kg/m², which falls within the normal range and does not indicate overweight or obesity. 1
Calculation Method
The BMI is calculated using the standard formula: weight (kg) divided by height (m) squared 2:
- Weight: 16.7 kg
- Height: 101.7 cm = 1.017 m
- BMI = 16.7 ÷ (1.017)² = 16.1 kg/m²
Alternatively using the centimeter formula: BMI = 16.7 ÷ 101.7 ÷ 101.7 × 10,000 = 16.1 kg/m² 1
Interpretation for Pediatric Patients
BMI values are meaningless without age and sex adjustment in children, as BMI varies dramatically with age. 1, 3 This calculated BMI of 16.1 kg/m² must be plotted on age- and sex-specific growth charts to determine if the child is underweight, normal weight, overweight, or obese. 1
Classification Thresholds for Children
- Obesity: BMI ≥95th percentile for age and sex 2, 3
- Overweight: BMI 85th-94th percentile for age and sex 2, 3
- Normal weight: BMI 5th-84th percentile for age and sex 1
- Underweight/concern: BMI <5th percentile (may indicate undernutrition or underlying medical condition) 1, 3
Critical Next Steps
You must obtain the child's exact age and sex to properly interpret this BMI value. 1, 3 Without this information, no clinical determination about weight status can be made.
Growth Chart Selection
- For children under 24 months: Use WHO growth standards 1, 3
- For children 24 months and older: Use CDC 2000 growth charts 1, 3
Monitoring Recommendations
Serial measurements every 3-6 months are recommended for tracking weight trajectory, as growth velocity over time using multiple data points is more informative than single measurements. 1, 3 A child consistently tracking along a specific percentile curve may be growing appropriately, whereas crossing upward or downward through percentile lines indicates significant changes requiring evaluation. 1
Important Clinical Caveats
BMI tends to underestimate overweight in tall individuals and overestimate overweight in short individuals and those with high lean body mass. 1, 3 This is particularly important in pediatric populations where growth patterns vary significantly.
Height and weight measurements must be obtained using standardized equipment and proper technique to ensure accuracy: weight recorded to nearest 0.1 kg on calibrated scale, and height measured using fixed stadiometer with child standing properly (or recumbent length board if under 24 months or unable to stand). 1