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Background: Increased cardiovascular events, which is the leading cause of death in type 2 diabetic patients, are mainly caused by accelerated atherosclerosis. Adiponectin has been suggested as a risk factor for cardiovascular diseases in cross-sectional studies. However, little is known about the impact of adiponectin on the progression of carotid atherosclerosis in type 2 diabetic patients. This study was conducted to evaluate the impact of early adiponectin levels on the progression of carotid atherosclerosis. Methods: From March 2009, 150 patients with type 2 diabetes were consecutively enrolled in our affiliated outpatient clinic. Anthropometric and biochemical data, including adiponectin levels, were measured in each participant. We measured the carotid intima-media thickness (CIMT) at baseline and at 1-year follow-up (n = 111). Then, we prospectively studied the relationship between the serum adiponectin levels and the progression of CIMT for 1 year. Results: Adiponectin levels negatively correlated with CIMT (r = -0.219, P = 0.015). Moreover, mean progression of CIMT was 0.016 ± 0.040 mm. However, there was no correlation between adiponectin levels and the progression of CIMT within 1-year follow-up period (r = -0.156, P = 0.080). Age (β = 0.556, P = 0.004), LDL cholesterol (β = 0.276, P = 0.042), and A1C (β = 0.309, P =0.038) were found to be independent risk factors for CIMT. However, A1C (β = 0.311, P = 0.042) was found to be the only independent risk factor for the progression of CIMT. Conclusion: In our study, adiponectin levels were negatively associated with CIMT. However, it did not affect the progression of CIMT at 1-year follow-up. Overall glycemic control is the most important factor in the progression of CIMT in patients with type 2diabetes.
