Introduction:

Obesity is an important independent risk factor for the development of dysglycaemia. A rapid diagnosis of weight excess can be made through the body mass index.

Objective:

Describe the relationship between high body mass index and prediction of dysglycaemias.

Method:

A search for relevant literature on the subject was conducted in the first quarter of 2019. Pubmed, SciELO and Google Academic were used as scientific information searchers. The search strategy included the following terms as keywords: "obesity", "body overweight", "body mass index", "excess weight", "dysglycaemias". Review articles, research articles and web pages were evaluated, generally with less than 10 years old, in Spanish, Portuguese and English languages, and specifically referencing the subject of study through the title. Items that did not meet these conditions were excluded. This allowed the study of 80 bibliographic references, of which 55 were cited in this article.

Conclusions:

The high body mass index increases the resistance to the action of pre-existing insulin, through different mechanisms. This facilitates the deterioration of carbohydrates metabolism with the possible onset of dysglycaemia. The use of this relationship and of validated cut-off points for our population would allow a rapid diagnosis of weight excess and the prediction of one of its important consequences: dysglycaemias.

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