Body Mass Index (BMI) is a commonly used tool to assess body weight and obesity. It is calculated by dividing a person's weight in kilograms by the square of their height in meters. The resulting number is then used to determine the person's BMI classification, which can indicate their risk for certain health conditions.
The following table shows the BMI classification categories and the corresponding percentile ranges and cut-off points for adults:
BMI Classification | Percentile Range | Cut-off Points |
Underweight | Less than 5th percentile | Less than 18.5 |
Normal weight | 5th to less than 85th percentile | 18.5 to less than 25 |
Overweight | 85th to less than 95th percentile | 25 to less than 30 |
Obesity class I | 95th to less than 99th percentile or BMI of 30 to less than 35 | 30 to less than 35 |
Obesity class II | BMI of 35 to less than 40 | 35 to less than 40 |
Obesity class III | BMI of 40 or higher | 40 or higher |
Note: The above table is based on the BMI classification system developed by the World Health Organization (WHO) for adults. However, the classification system may differ for children and adolescents.
The BMI classification system provides a rough estimate of a person's body fat based on their weight and height. However, it is important to note that BMI is not a perfect measure of body fat and may not apply to certain individuals, such as athletes with high muscle mass.
It is recommended to consult with a healthcare professional to determine if a person's BMI is a health risk, as well as other factors such as waist circumference, family history, and lifestyle habits.
BMI classification can provide valuable information about a person's weight status and potential health risks. Understanding the percentile range and cut-off points for each classification can help individuals make informed decisions about their health and wellbeing.
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