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Before the 20th century, obesity was rare;[160] in 1997 the WHO formally recognized obesity as a global epidemic.[80] As of 2008 the WHO estimates that at least 500 million adults (greater than 10%) are obese, with higher rates among women than men.[161] The rate of obesity also increases with age at least up to 50 or 60 years old[162] and severe obesity in the United States, Australia, and Canada is increasing faster than the overall rate of obesity.[19][163][164] Once considered a problem only of high-income countries, obesity rates are rising worldwide and affecting both the developed and developing world.[30] These increases have been felt most dramatically in urban settings.[161] The only remaining region of the world where obesity is not common is sub-Saharan Africa.[2] |
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