Epidemiology of Obesity
Obesity is common where there is an abundant supply of appetizing foods, as anybody can
verify in the streets of a prosperous town or holiday resort. Numerous surveys have recorded a
prevalence in selected samples of communities. As the condition is not noticeable, there is no
reliable information on prevalence in any country.
A sensible guess is that among adults in the United States and the United Kingdom between 23
and 33 per cent have Grade I obesity, about 4% Grade II, and 0.05% Grade III . The first are
the multitude providing the support for the huge slimming industry; the second present an
enormous problem to the medical services; the third fortunately are much less common, but
general practitioner with 2500 patients on his list is likely to have one such case.
Obesity occurs at all ages and commonly affects the health of the infants, adolescents and the
elderly. Obesity is increasing in prevalence in all the world ; we are presenting some data from
the United States and the United Kingdom .
Approximately 47 million Americans -- about 1 (23%) in 4 adults -- have the metabolic
syndrome. This figure includes 10 million to 15 million individuals with type 2 diabetes (evidence
suggests that insulin resistance and impaired glucose tolerance [IGT] may be the link among all
the manifestations of the metabolic syndrome).[10] In the US the prevalence of obesity (23%)
is nearly similar to that of hypertension (24%) .
As the US population ages, the prevalence rate of the metabolic syndrome will increase steadily
among men and women in the older age groups. The prevalence of the metabolic syndrome
among older segments of the population is already approaching 50%. However, African
American women have an approximately 57% higher prevalence than men.
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