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      Hemoglobin Concentrations Are Closely Linked to Renal Function in Patients with Type 1 or 2 Diabetes Mellitus

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          Abstract

          Background/Aims: It has been reported that anemia is more common in patients with diabetes mellitus, and that it occurs early in the disease process. Methods: In this study, we evaluated hemoglobin (Hb) values of patients with diabetes type 1 or 2 from a large collective receiving care from a tertiary center. A total of 751 patients with type 1 diabetes and 3,306 patients with type 2 were studied. Correlations were calculated for Hb with the following parameters: metabolic control (HbA<sub>1c</sub> and blood glucose), renal function [estimated glomerular filtration rate (eGFR), serum creatinine, albuminuria, proteinuria], blood leukocytes, duration of diabetes and use of ACE inhibitors/AT1-receptor antagonists. Results: 17% of patients with type 1 diabetes and 14% of those with type 2 had anemia [defined as an Hb <8.5 mmol/l (<13.68 g/dl) in men and <7.5 mmol/l (<12.07 g/dl) in women). There was a close positive correlation between Hb and eGFR, and a negative correlation with albuminuria and proteinuria. These close associations were also confirmed with linear regression analysis. A significant negative correlation was observed between serum creatinine levels and Hb. There was no negative correlation between actual Hb and mean HbA<sub>1c</sub> in the individual follow-up periods. No correlation was found between blood glucose (morning and postprandial blood glucose) and Hb. Blood leukocyte numbers, as a parameter of systemic inflammation, were not correlated with Hb. The use of ACE inhibitors/AT1-receptor antagonists had no adverse effect on Hb in our study cohort. Conclusion: No negative effects of metabolic control on Hb could be demonstrated in this study.

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          Hemoglobin level, chronic kidney disease, and the risks of death and hospitalization in adults with chronic heart failure: the Anemia in Chronic Heart Failure: Outcomes and Resource Utilization (ANCHOR) Study.

          Previous studies have associated reduced hemoglobin levels with increased adverse events in heart failure. It is unclear, however, whether this relation is explained by underlying kidney disease, treatment differences, or associated comorbidity. We examined the associations between hemoglobin level, kidney function, and risks of death and hospitalization in persons with chronic heart failure between 1996 and 2002 within a large, integrated, healthcare delivery system in northern California. Longitudinal outpatient hemoglobin and creatinine levels and clinical and treatment characteristics were obtained from health plan records. Glomerular filtration rate (GFR; mL.min(-1).1.73 m(-2)) was estimated from the Modification of Diet in Renal Disease equation. Mortality data were obtained from state death files; heart failure admissions were identified by primary discharge diagnoses. Among 59,772 adults with heart failure, the mean age was 72 years and 46% were women. Compared with that for hemoglobin levels of 13.0 to 13.9 g/dL, the multivariable-adjusted risk of death increased with lower hemoglobin levels: an adjusted hazard ratio (HR) of 1.16 and 95% confidence interval (CI) of 1.11 to 1.21 for hemoglobin levels of 12.0 to 12.9 g/dL; HR, 1.50 and 95% CI, 1.44 to 1.57 for 11.0 to 11.9 g/dL; HR, 1.89 and 95% CI, 1.80 to 1.98 for 10.0 to 10.9; HR, 2.31 and 95% CI, 2.18 to 2.45 for 9.0 to 9.9; and HR, 3.48 and 95% CI, 3.25 to 3.73 for or = 17.0 g/dL were associated with an increased risk of death (adjusted HR, 1.42; 95% CI, 1.24 to 1.63). Compared with those with a GFR > or = 60 mL . min(-1).1.73 m(-2), persons with a GFR or = 17 g/dL) or reduced (<13 g/dL) hemoglobin levels and chronic kidney disease independently predict substantially increased risks of death and hospitalization in heart failure, regardless of the level of systolic function. Randomized trials are needed to evaluate whether raising hemoglobin levels can improve outcomes in chronic heart failure.
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            Glycated albumin is a better glycemic indicator than glycated hemoglobin values in hemodialysis patients with diabetes: effect of anemia and erythropoietin injection.

            The significance of glycated albumin (GA), compared with casual plasma glucose (PG) and glycated hemoglobin (HbA(1c)), was evaluated as an indicator of the glycemic control state in hemodialysis (HD) patients with diabetes. The mean PG, GA, and HbA(1c) levels were 164.5 +/- 55.7 mg/dl, 22.5 +/- 7.5%, and 5.85 +/- 1.26%, respectively, in HD patients with diabetes (n = 538), which were increased by 51.5, 31.6, and 17.7%, respectively, compared with HD patients without diabetes (n = 828). HbA(1c) levels were significantly lower than simultaneous PG and GA values in those patients in comparison with the relationship among the three parameters in patients who had diabetes without renal dysfunction (n = 365), as reflected by the significantly more shallow slope of regression line between HbA(1c) and PG or GA. A significant negative correlation was found between GA and serum albumin (r = -0.131, P = 0.002) in HD patients with diabetes, whereas HbA(1c) correlated positively and negatively with hemoglobin (r = 0.090, P = 0.036) and weekly dose of erythropoietin injection (r = -0.159, P < 0.001), respectively. Although PG and GA did not differ significantly between HD patients with diabetes and with and without erythropoietin injection, HbA(1c) levels were significantly higher in patients without erythropoietin. Categorization of glycemic control into arbitrary quartile by HbA(1c) level led to better glycemic control in a significantly higher proportions of HD patients with diabetes than those assessed by GA. Multiple regression analysis demonstrated that the weekly dose of erythropoietin, in addition to PG, emerged as an independent factor associated with HbA(1c) in HD patients with diabetes, although PG but not albumin was an independent factor associated with GA. In summary, 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 HbA(1c) in these patients might lead to underestimation likely as a result of the increasing proportion of young erythrocyte by the use of erythropoietin.
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              Unrecognized anemia in patients with diabetes: a cross-sectional survey.

              Anemia is common in diabetes, potentially contributing to the pathogenesis of diabetes complications. This study aims to establish the prevalence and independent predictors of anemia in a cross-sectional survey of 820 patients with diabetes in long-term follow-up in a single clinic. A full blood count was obtained in addition to routine blood and urine test results for all patients over a 2-year period to encompass all patterns of review. Predictors of the most recent Hb concentration and anemia were identified using multiple and logistic regression analysis. A total of 190 patients (23%) had unrecognized anemia (Hb 2 times (odds ratio [OR] 2.3) and macroalbuminuric patients >10 times (OR 10.1) as likely to have anemia than normoalbuminuric patients with preserved renal function (GFR >80 ml/min). Anemia is a common accompaniment to diabetes, particularly in those with albuminuria or reduced renal function. Additional factors present in diabetes may contribute to the development of increased risk for anemia in patients with diabetes.
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                Author and article information

                Journal
                KBR
                Kidney Blood Press Res
                10.1159/issn.1420-4096
                Kidney and Blood Pressure Research
                S. Karger AG
                1420-4096
                1423-0143
                2008
                December 2008
                15 September 2008
                : 31
                : 5
                : 313-321
                Affiliations
                Klinik für Innere Medizin III, Klinikum der Friedrich-Schiller-Universität, Jena, Germany
                Article
                155230 Kidney Blood Press Res 2008;31:313–321
                10.1159/000155230
                18791327
                19e9c14b-800e-4686-a2e3-3b70ccf35b6d
                © 2008 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                : 27 March 2008
                : 25 July 2008
                Page count
                Figures: 2, Tables: 7, References: 28, Pages: 9
                Categories
                Original Paper

                Cardiovascular Medicine,Nephrology
                Diabetic nephropathy,Anemia,Diabetes mellitus, type 1 and 2,Metabolic control

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