Studies agree on the best blood glucose levels for diabetics with kidney failure
Two separate studies presented during the American Society of Nephrology's Annual Kidney Week agree that diabetics with kidney failure shouldn't lower their blood glucose levels as much as diabetics without kidney failure.
For most patients with diabetes, taking medication to lowering blood levels of hemoglobin A1C, which reflect average blood glucose levels, to <7% can lower their risk of developing certain complications. Sylvia Paz Ramirez, MD (Arbor Research Collaborative For Health) and her colleagues wondered whether this holds true for diabetic patients who have developed kidney failure.
The researchers analyzed data from 8,437 dialysis patients from 12 countries who had diabetes. They found that the lowest risk of death during the study occurred when hemoglobin A1C levels were between 7% and 8%. Both high and low levels were linked with increased rates of death, particularly for patients with levels of 9% or higher or less than 5%. Among patients with A1C levels below 7%, death rates were higher among patients taking diabetes medications.
In a similar study, Miklos Molnar MD, PhD (Semmelweis University, in Budapest, Hungary) and his team examined death rates among 54,757 diabetic patients treated at DaVita dialysis clinics from July 2001 through June 2006 with follow-up through June 2007. They found a link between high death rates and hemoglobin A1C levels of 8% or greater. Very low levels also increased patients' risk of dying during the study.
These results indicate that unlike for most patients with diabetes, diabetics with kidney failure benefit the most when their hemoglobin A1C levels are between 7% and 8%, although clinical trials are needed to definitely determine the optimal range.
More information: Study authors for "Hemoglobin A1C Levels and Mortality in the ESRD Population: Findings from the DOPPS" (abstract TH-OR065) include Sylvia Paz Ramirez, MD, Jyothi Thumma, Francesca Tentori, MD, Brenda Gillespie, PhD, Masaaki Inaba, MD, PhD, Robert Nelson, MD, PhD, Ronald Pisoni, PhD, and Bruce Robinson, MD.
Study authors for "Glycemic Control and Mortality in Hemodialysis Patients with Diabetes Mellitus: A Six Year Cohort Study" (abstract TH-OR085) include Miklos Molnar, MD, PhD, Joni Ricks, Csaba Kovesdy, MD, Anuja Shah, MD, Allen Nissenson, MD, Mark Williams, MD, and Kamyar Kalantar-Zadeh, MD, PhD.
Provided by American Society of Nephrology
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