All comparisons between countries should be done using the comparative prevalence, which is adjusted to the world population.
The data for diabetes rates include both type 1 and type 2 diabetes.
The prevalence of diabetes includes both undiagnosed and previously diagnosed diabetes.
Prevalence studies were based on different diagnositc criteria (WHO-1985, WHO-1999 and ADA-1997). Most studies were based on the WHO-1985 diagnostic criteria.
| The oral glucose tolerance test (OGTT) was the preferred method of screening, followed by two-hour blood glucose alone, then the fasting blood glucose alone and then self-report. Studies from France, Germany Italy, the Netherlands and Norway only provided data on self-reported diabetes. To account for undiagnosed diabetes the prevalence of diabetes was doubled for these countries.
The data give an indication of the burden of diabetes in each country, but comparisons between countries should be made with caution because where no data for countries were available, the prevalence rates of neighbour countries of similar ethnicity and economic circumstances were applied to the population distribution of countries without data.
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Literature and data sources
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