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Background: Impaired glucose regulation represents an opportunity to prevent Type 2 diabetes mellitus. It is important to have a clear understanding of the prevalence of this condition in order to be able to plan interventions and health care provision. This paper presents a meta-analysis of literature assessing the prevalence of impaired glucose regulation in the general population of developed countries in Europe. Methods: Five electronic databases were systematically searched in March 2014 to identify English language articles with general population samples aged 18 and over from developed countries in Europe. Values for the measures of interest were combined using a random effects model and analysis of the effects of moderator variables was carried out. Results: A total of 5594 abstracts were screened, with 46 studies included in the review. Overall prevalence of impaired glucose regulation was 22.3%. Mean prevalence of impaired glucose tolerance was 11.4% (10.1-12.8) and did not differ by gender. Sample age, diagnostic criteria and country were found to have a significant univariate effect on prevalence of impaired glucose tolerance but only diagnostic criteria remained significant in multivariate analysis. Mean prevalence of impaired fasting glucose was significantly higher in men at 10.1% (7.9-12.7) compared with 5.9% in women (4-8.7). The only moderator variable with a significant effect on impaired fasting glucose prevalence was country. Conclusions: This meta-analysis shows a moderate prevalence of impaired glucose regulation in developed Europe with over one in five people meeting the criteria for either impaired glucose tolerance, impaired fasting glucose or both. [ABSTRACT FROM AUTHOR]