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Classification |
Principal cut-off points (Kg/m2) |
|
Underweight |
<18.50 |
|
Normal range |
18.50 - 24.99 |
|
Overweight |
≥25.00 |
|
Obese |
≥30.00 |
Source: World Health Organization
The World Health Organization (WHO) defines "overweight" as a BMI value equal to or more than 25, while for "obesity", the value is 30. These cut-off points provide a benchmark for individual assessment.
Please note that BMI is the same for both sexes and for all ages of adults. But:
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It looks at overall body weight in relation to height. But this may not correspond to the same degree of fatness in different individuals. And so it is not a good guide to body make-up and cannot distinguish between a problem with excess fat and a big build.
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The healthy band is much too wide to give the individual an idea of the ideal weight.
Overweight and Obesity Statistics
The latest projections from WHO indicate that globally one billion adults are overweight and more than 300 million are obese.
If no further action is being taken, by 2015, 1.5 billion adults will be overweight. And at least 2.6 million people each year die as a result of being overweight or obese.
Globally, over 42 million children under five years of age are overweight.
Childhood obesity is one of the most serious public health challenges of the 21st century. Overweight children are likely to become obese adults. They are more likely than non-overweight children to develop diabetes and cardiovascular diseases at a younger age, which in turn are associated with a higher chance of premature death and disability.
Currently, about 44% of diabetes, 23% of ischaemic heart disease and 7 to 41% of certain cancers in the world are attributable to overweight and obesity.
Once considered a problem only in high-income countries, overweight and obesity are now dramatically on the rise in low- and middle-income countries, particularly in urban settings.
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