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To determine the prevalence of type 2 diabetes mellitus in a sample of the adult population of Alexandria, Egypt, and to delineate the epidemiologic profile of the disease in this community.

This cross-sectional study was conducted on a representative sample of the population. Participants provided demographic data, their medical history, and blood samples for measurement of plasma glucose (fasting and after oral glucose load) and underwent a detailed physical examination.

Of 10,640 eligible subjects, 9657 (90.8%) aged 18–90 years agreed to participate (3795 men, 5862 women). We found an age-adjusted prevalence of diabetes of 16.8% (men, 12.7%; women 19.1%); of prediabetes, 14.6% (men, 13.5%; women, 15.2%), and of newly diagnosed diabetes, 5.5% (men, 3.3%; women, 6.6%). Diabetes was most common in people older than 50 years; prediabetes was most common in 30 …