Body mass index

Definition

Body Mass Index (BMI) is a numerical value derived from an individual's weight and height, used to categorize their weight status. It is a widely used screening tool to identify potential weight problems in adults.

5 Must Know Facts For Your Next Test

1. BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters (kg/m²).
2. The BMI categories include underweight (BMI < 18.5), normal weight (BMI 18.5-24.9), overweight (BMI 25-29.9), and obesity (BMI ≥ 30).
3. BMI does not directly measure body fat but correlates with more direct measures of body fat.
4. High BMI can increase the risk of chronic conditions like cardiovascular disease, type 2 diabetes, and certain cancers.
5. Pharmacological treatments for weight management may be considered for individuals with a BMI ≥ 30 or those with a BMI ≥ 27 with obesity-related comorbidities.

Review Questions

• How is Body Mass Index (BMI) calculated?
• What are the different BMI categories and their ranges?
• Why might BMI be used as a screening tool in clinical settings?

Related terms

Obesity:

A medical condition characterized by an excess amount of body fat, typically defined by a BMI of ≥30.

Waist Circumference: A measurement taken around the abdomen at the level of the iliac crest, used to assess abdominal fat.

Basal Metabolic Rate (BMR): The number of calories required for maintaining basic physiological functions at rest.