Abstract
The significance of glycated albumin (GA) compared with casual plasma glucose (PG) and glycated hemoglobin (HbA1c) was evaluated as an indicator of the glycemic control state in hemodialysis (HD) patients with diabetes. In HD patients with diabetes (n = 25), the mean PG, GA and HbA1c levels were 192.9 + 23 mg/dL, 278.8 + 43 μmol/L and 5.9 + 0.5%, respectively, which were higher by 43.9%, 67.04% and 18%, respectively, compared with HD patients without diabetes (n = 25). HbA1c levels were significantly lower than simultaneous PG and GA values in those patients in comparison with the three parameters in patients who had diabetes without renal dysfunction (n = 25). A significant negative correlation was found between GA and serum albumin (r = 0.21, P <0.05) in HD patients with diabetes, whereas HbA1c correlated positively and negatively with hemoglobin (r = 0.11, P <0.01) and weekly dose of erythropoietin injection (r = -0.19, P < 0.01), respectively. Although PG and GA did not differ significantly between HD patients with diabetes and with and without erythropoietin injection, HbA1c levels were significantly higher in patients without erythropoietin. Categorization of glycemic control into arbitrary quartiles by GA level led to better glycemic control in a significantly higher proportion of HD patients with diabetes than those assessed by HA1c. Multiple regression analysis demonstrated that hemoglobin in addition to PG emerged as an independent factor associated with HbA1c in HD patients with diabetes, while PG, body mass index and albumin were an independent factor associated with GA. it is suggested that GA provides a significantly better measure to estimate glycemic control in HD patients with diabetes and that the assessment of glycemic control by HbA1c in these patients might lead to likely underestimation as a result of the increasing proportion of young erythrocyte by the use of erythropoietin.
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