1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a reliable indicator of body fatness for most people.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in meters (m)

Explanation: The formula divides weight by the square of height to account for the relationship between body size and mass.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening tool for weight categories that may lead to health problems. For older adults, BMI helps assess nutritional status and health risks.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For accurate results, measure height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories for older adults?
A: For geriatric patients: Underweight (<22), Normal (22-27), Overweight (27-30), Obese (>30). These ranges may differ slightly from general adult ranges.

Q2: Are there limitations to BMI for elderly?
A: Yes, BMI doesn't account for muscle mass, bone density, or fat distribution. It may overestimate body fat in muscular individuals and underestimate it in those who have lost muscle mass.

Q3: Should BMI interpretation differ for seniors?
A: Yes, slightly higher BMI may be protective in older adults, as very low BMI is associated with increased mortality in this population.

Q4: What additional assessments complement BMI?
A: Waist circumference, muscle mass assessment, and nutritional screening provide more comprehensive evaluation of health status in elderly.

Q5: How often should BMI be measured in older adults?
A: At least annually, or more frequently if there are concerns about weight loss/gain or nutritional status.