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BMI is calculated by dividing weight in kilograms divided by height squared. Categories of weight are classified as followed: BMI less than 18.5 underweight, 18.5-24.9 normal weight, 25-25.9 overweight, 30-34.9 obese -class I, 35-39.9 obese- class II, and 40 or more extreme obesity-class III. BMI is not a direct measure of adiposity. ................
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