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Prevalence of diabetes and prediabetes mellitus in the first-degree relatives of patients with type 2 diabetes in Chengdu



Prevalence of diabetes and prediabetes mellitus in the first-degree relatives of patients with type 2 diabetes in Chengdu



Sichuan Da Xue Xue Bao. Yi Xue Ban 42(2): 264-268



To investigate the prevalence of diabetes and prediabetes mellitus in the first-degree relatives (FDR) of patients with type 2 diabetes (T2DM) in Chengdu. A cross-sectional study was undertaken in Chengdu. A total of 2306 adults were recruited, including 535 FDR of T2DM patients and 1771 people without a family history of diabetes. All participants received glucose tolerance tests and measurements of waist, blood pressure and blood lipids. (1) The FDR of T2DM patients had greater standardized prevalence of diabetes than those without a family history of diabetes (26.6% vs. 9.2%). The standardized prevalence of prediabetes in these two groups was 15.0% and 14.1%, respretively. (2) Greater standardized prevalence of diabetes were found in both female (25.5%) and male (28.5%) FDR of T2DM patients compared with their counterparts without a family history of diabetes (women 8.7%, men 11.2%). The standardized prevalence of prediabetes between those with and without a family history of diabetes was 15.9% and 13.4% in women, 13.7% and 15.3% in men, respretively. (3) The younger than 40 years old FDR of T2DM patients had greater prevalence of diabetes and prediabetes than their counterpart without a family history of diabetes, while the FDR of T2DM with an age of > or =40 years old had greater prevalence of diabetes than their counterparts only (P > 0.05). The FDR of T2DM patients with <25 kg/m2 body mass index (BMI) had greater prevalence of diabetes and prediabetes than their counterparts without a family history of diabetes (25.1% vs. 7.4%, 13.2% vs. 9.3%, P < 0.05). The FDR of T2DM patients with > or = 25 kg/m2 BMI had greater prevalence of diabetes (33.0% vs. 13.7%, P < 0.05) but less prevalence of prediabetes (19.2% vs. 26.8%, P < 0.05) than their counterparts without a family history of diabetes. (4) The logistic regression showed that triglyceride (TG) was a risk factor for diabetes in those FDR of T2DM patients (OR = 1.363) and those without a family history of diabetes (OR = 1.27), and high density lipoprotein cholesterol (HDL-C) was a protective factor for diabetes in those without a family history of diabetes (OR = 0.546). The FDR of T2DM patients have high risk of diabetes and those younger than 40 years or with <25 kg/m2 BMI also have high risk of prediabetes.

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