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Obesity
Quantifying Obesity with Body Mass Index ( Weight/Height
2
)
BMI (kg/m2)
Classification*
Risk of obesity comorbidity
18.5 – 24.9
Normal range
Negligible
25.0 – 29.9
Overweight
Mildly increased
> 30.0
30.0 – 34.9
35.0 – 39.9
> 40.0
Obese
Class I
Class II
Class III
Moderate
Severe
Very Severe
* Classification of the World Health Organization (WHO) and international Obesity Task Force.