Worldwide obesity has more than doubled since 1980. In 2014, more than 1.9 billion adults, 18 years and older, were overweight. Of these over 600 million were obese. 39% of adults aged 18 years and over were overweight in 2014, and 13% were obese. Most of the world's population live in countries where overweight and obesity kills more people than underweight. 42 million children under the age of 5 were overweight or obese in 2013.
Obesity is preventable.
The word "obesity" literally means too much body fat which might eventually have adverse effects on their health. Whether a person is obese or not is generally based on the body mass index (BMI) and the waist circumference. Body mass is divided by the square of the body height, and is universally expressed in units of kg/m2.
The WHO definition is
- BMI greater than or equal to 25 is overweight
- BMI greater than or equal to 30 is obesity.
The waist circumference >102 cm (male) and >88 cm (female) is also considered obese.
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