Serum uric acid level is positively related to albuminuria in type 2 diabetic patients / 中华肾脏病杂志

ABSTRACT

Objective To investigate association between serum uric acid (SUA),albuminuria and glomerular filtration rates (eGFR) in type 2 diabetic patients.Methods A total of 220 patients were enrolled in this cross-sectional study.According to urinary albumin excretion rates,patients were divided into 3 groupsnormoalbuminuria (NAU) group,microalbuminuria (MAU) group,and macroalbumnuria group (MAAU).The first two groups were subdivided at SUA ＞ 420 μmol/L (＞ 357 μmol/L,female) into normouricemia group and hyperuricemia group,at eGFR ＞ 90 ml/min into high and low renal function groups.General information,blood biochemical results were collected to analyze the association between serum uric acid,eGFR,UAER and urine albumin quantification among different groups.Results The difference of SBP,duration of diabetes (DD),Scr,SUA and eGFR between every two groups were significant (P ＜ 0.05).SBP,DD,Scr and SUA were highest in subjects with macroalbumnuria,second in microalbuminuria group,and lowest in normoalbuminuria group,while eGFR was lowest in macroalbumnuria group and highest in normoalbuminuria group.Prevalence of hyperuricemia in macroalbumnuria group (56.9％) and microalbuminuria group (51.2％) were also significantly higher than that in normoalbuminuria group (17.5％) (all P ＜ 0.01).The difference of UAER in the subgroups of normouricemia and hyperuricemia was more significant in microalbuminuria group than in normoalbuminuria group.eGFR was significantly lower in hyperuricemia subgroups (P ＜0.01).Age and SUA were significantlg higher in subjects with low renal function compared with high eGFR (P ＜ 0.05).Linear regression analysis indicated SUA was negatively correlated with eGFR after adjusted age,DD and UAER (β =-0.430,P ＜ 0.01).Binary logistic regression analysis found that increased age,DD and SUA were risk factors of microalbuminuria β =1.092,95％ CI(1.025,1.163),P ＜ 0.01;β =1.005,95％CI(1.001,1.009),P ＜ 0.05;β =1.407,95％ CI(1.052,1.881),P ＜ 0.05)] and SUA,age were risk factors of early renal function decline [β =1.015,95 ％ CI(1.00,1.023),P ＜ 0.01;β =1.098,95％ CI(1.006,1.199),P ＜ 0.05].Conclusion SUA is independently associated with albumnuria and renal function decline in type 2 DM patients.