Furthermore, the presence of microalbuminuria is generally associated with a poorer glycometabolic control and a higher prevalence of chronic complications including diabetic retinopathy, peripheral vascular disease, sellectchem and diabetic neuropathy [7]. The association between microalbuminuria and Mg depletion is a controversial issue. A previous report showed that high doses of Mg reduce microalbuminuria in traumatic critically ill patients at 36 hour, after infusion [8]. Conversely, there were no significant differences between patients with hypomagnesemia and normal subjects with respect to microalbuminuria [9]. Therefore, the aim of the present study was to evaluate the association between serum Mg and microalbuminuria in diabetic patients in China. 2. Materials and Methods 2.1.
Research Design and Subjects This community-based cross-sectional study was conducted in Jiading district, Shanghai, China, from March to August, 2010. In brief, 10375 subjects, aged 40 years or above, were enrolled to participate in the survey. Among those subjects, there were 1872 diabetic patients, those with fasting plasma glucose (FPG) �� 7.0mmol/L and/or 2h plasma glucose (2h-PG) �� 11.1mmol/L or with a history of diabetes. The diagnosis of diabetes was defined according to the 1999 World Health Organization criteria [10]. Microalbuminuria was defined as 30mg/g �� urinary albumin-creatinine ratio (UACR) < 300mg/g [11]. For analysis, we excluded subjects who had missing data on serum Mg or urine albumin or urine creatinine (n = 5), those who had urinary tract infection, glomerulonephritis, nephritic syndrome, or kidney cancer (n = 17), and those who had UACR �� 300mg/g (n = 21).
Finally, a total of 1829 diabetic subjects (775 males and 1054 females) were included in the analysis. This study was conducted with the approval of the institutional review board of Ruijin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine. All participants provided informed consent. 2.2. Clinical Data Collection and Biochemical Measurements The information about demographic characteristics, lifestyle, the history of chronic diseases, and current use of medication, including antihypertensive drugs and antidiabetic drugs, were obtained by a standard interview questionnaire.
Current smokers or drinkers were defined as subjects who smoked cigarettes or consumed alcohol regularly in the past 6 months, while subjects who never or formerly smoked cigarettes or consumed alcohol were defined as noncurrent smokers or noncurrent drinkers. Blood pressure was measured at the nondominant arm three times consecutively at 1min intervals after subjects had rested AV-951 for at least 5min in a sitting position, using an automated electronic device (OMRON Model HEM-752; Omron, Dalian, China). The average of the three measurements was used in the analysis.