TITLE

High prevalence of undiagnosed diabetes and abnormal glucose tolerance in the Iranian urban population: Tehran Lipid and Glucose Study

AUTHOR(S)
Hadaegh, Farzad; Bozorgmanesh, Mohammad Reza; Ghasemi, Asghar; Harati, Hadi; Saadat, Navid; Azizi, Fereidoun
PUB. DATE
January 2008
SOURCE
BMC Public Health;2008, Vol. 8, p176
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: To estimate the prevalence of diagnosed and undiagnosed diabetes mellitus, impaired fasting glucose (IFG), impaired glucose tolerance (IGT), and combined IFG/IGT in a large urban Iranian population aged ⩾ 20 years. Methods: The study population included 9,489 participants of the Tehran Lipid and Glucose Study with full relevant clinical data. Age-standardized prevalence of diabetes and glucose intolerance categories were reported according to the 2003 American Diabetes Association definitions. Age-adjusted logistic regression models were used to estimate the numbers needed to screen (NNTS) to find one person with undiagnosed diabetes. Results: The prevalence of diagnosed and undiagnosed diabetes, isolated IFG, isolated IGT, and combined IFG/IGT were 8.1%, 5.1%, 8.7%, 5.4% and 4.0% in men and 10%, 4.7%, 6.3%, 7.6%, and 4.5% in women respectively. Participants with undiagnosed diabetes had higher age, body mass index (BMI), waist circumference, systolic and diastolic blood pressures, triglycerides (all p values <0.001) and lower HDL-cholesterol (only in women, p < 0.01) compared to normoglycemic subjects. Undiagnosed diabetes was associated with family history of diabetes, increased BMI (⩾ 25 kg/m²), abdominal obesity, hypertriglyceridemia, hypertension and low HDL-cholesterol levels. Among men, a combination of increased BMI, hypertension, and family history of diabetes led to a NNTS of 1.6 (95% CI: 1.57-1.71) and among women a combination of family history of diabetes and abdominal obesity, yielded a NNTS of 2.2 (95% CI: 2.1-2.4). Conclusion: In conclusion, about one third of Tehranian adults had disturbed glucose tolerance or diabetes. One-third of total cases with diabetes were undiagnosed. Screening individuals with BMI ⩾ 25 kg/m² (men), hypertension (men), abdominal obesity (women) and family history of diabetes may be more efficient.
ACCESSION #
51485766

 

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