At a glance
|
2007 |
2025 |
|
| Total world population (billions) |
6.6 |
7.9 |
| Adult population (age 20-79, billions) |
4.1 |
5.2 |
|
|
||
| Impaired Glucose Tolerance (20- 79 age group) | ||
| Comparative prevalence (%) |
7.5 |
8.0 |
| Number of people with IGT (millions) |
308 |
418 |
Diabetes mellitus and lesser forms of glucose intolerance, particularly impaired glucose tolerance (IGT), can now be found in almost every population in the world.
IGT is an asymptomatic condition defined by elevated (though not diabetic) levels of blood glucose two hours after a 75g oral glucose challenge. Along with impaired fasting glucose, it is now recognized as being a stage in the transition from normality to diabetes. Thus, individuals with IGT are at high risk of progressing to type 2 diabetes, although such progression is not inevitable, and probably over 30% of individuals with IGT will return to normal glucose tolerance over a period of several years.
Data on case numbers and national prevalence of impaired glucose tolerance (IGT) are presented for the years 2007 and 2025. The decision to include data on IGT was based on two major factors associated with its presence: it greatly increases the risk of developing diabetes 1 , and it is associated with the development of cardiovascular disease 2 3 .
1.Shaw,JE Zimmet,PZ de Courten,M. Dowse,GK Chitson,P. Gareeboo,H. Hemraj,F. Fareed,D. Tuomilehto,J. Alberti,KGMM Impaired fasting glucose or impaired glucose tolerance. What best predicts future diabetes in Mauritius?. Diabetes Care.1999; 22: 399-402
2.Perry,RC Baron,AD Impaired glucose tolerance. Why is it not a disease?. Diabetes Care.1999; 22: 883-885
3.Tominaga,M. Eguchi,H. Manaka,H. Igarashi,K. Kato,T. Sekikawa,A. Impaired glucose tolerance is a risk factor for cardiovascular disease, but not impaired fasting glucose. The Funagata Diabetes Study.. Diabetes Care.1999; 22(6): 920-924
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