1. What is the Adjusted BMI for Amputees?

The Adjusted BMI calculation accounts for missing limb weight in amputees by adjusting the standard BMI value based on the percentage of body mass lost to amputation. This provides a more accurate assessment of body composition for individuals with limb loss.

2. How Does the Calculator Work?

The calculator uses the adjusted BMI formula:

Where:

• \( BMI \) — Standard body mass index (kg/m²)
• \( Amputation Percentage \) — Estimated percentage of body mass lost to amputation

Explanation: The equation compensates for the reduced total body weight in amputees by proportionally increasing the BMI value.

3. Importance of Adjusted BMI

Details: Standard BMI calculations can significantly underestimate obesity in amputees. Adjusted BMI provides more accurate classification of weight status, which is important for nutritional assessment and health risk evaluation.

4. Using the Calculator

Tips: Enter standard BMI in kg/m² and amputation percentage (0-99%). Typical amputation percentages: hand (0.7%), below elbow (2.3%), above elbow (2.7%), foot (1.5%), below knee (5.9%), above knee (8.5%).

5. Frequently Asked Questions (FAQ)

Q1: Why adjust BMI for amputees?
A: Standard BMI assumes full body mass. Amputees have reduced total weight but similar metabolic needs, so adjusted BMI prevents underestimation of obesity.

Q2: How is amputation percentage determined?
A: Percentage estimates are based on standardized tables of body segment mass percentages. Clinical assessment may provide more precise values.

Q3: What BMI categories apply to adjusted BMI?
A: Use standard BMI categories (underweight <18.5, normal 18.5-24.9, overweight 25-29.9, obese ≥30) with the adjusted value.

Q4: Does this work for multiple amputations?
A: Yes, sum the percentages for all amputated limbs (but total must be less than 100%).

Q5: Are there limitations to this adjustment?
A: This method assumes proportional fat and lean mass loss, which may not always be accurate. Clinical judgment is still important.