Body mass index is a formula that uses both height and weight to determine if you are considered of healthy weight. BMI is calculated as the individual's body weight divided by the square of their height. BMI is frequently used to assess how much an individual's body weight departs from what is normal or desirable for a person of his or her height.
The calculation of BMI values are age-independent and the same for both sexes the criteria used to interpret the meaning of the BMI number for children and teens are different from those used for adults. Also BMI may not correspond to the same degree of fatness in different populations due, in part, to different body proportions. The health risks associated with increasing BMI are continuous and the interpretation of BMI gradings in relation to risk may differ for different populations.
A high BMI is associated with increased risk of death. The health risks increase below the cut-off point of 25 kg/m2 that defines overweight in the current WHO classification.
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