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Hypoglycemia link to HbA1c has declined in type 1 diabetes

2014-10-07
(Press-News.org) The link between low average glucose blood levels and greater risk for severe hypoglycemia and hypoglycemic coma substantially declined between 1995 and 2012 in young Germans and Austrians with type 1 diabetes, according to a study published by Beate Karges and colleagues from the RWTH Aachen University, Germany in this week's PLOS Medicine.

The researchers obtained measurements of average blood glucose levels (measured as HbA1c) and the incidents of severe hypoglycemia and hypoglycemic coma from 37,539 children and young adults with type 1 diabetes between 1995 and 2012 in Austria and Germany. From 1995 to 2012, the relative risk for severe hypoglycemia and hypoglycemic coma per 1% decrease in HbA1c levels declined from 1.28 to 1.05 for severe hypoglycemia and from 1.39 to 1.01 for coma, corresponding to a drop in risk of 1.2% and 1.9% each year, respectively. This decrease mainly occurred because of substantial reductions in the risk of hypoglycemia in patients with lower average blood glucose levels measured as HbA1c between 6.0% and 7.9%.

While the study does not examine the causes of this reduction, the authors do note that the use of insulin analogs and of insulin pumps increased and there was an increase in how often patients monitored their blood glucose level over this time period.

The authors say: "The previously strong association of low HbA1c with severe hypoglycemia and coma in young individuals with type 1 diabetes has substantially decreased in the last decade, allowing achievement of near-normal glycemic control in these patients."

INFORMATION: Research Article

Funding: This work was supported by the Competence Network for Diabetes Mellitus, funded by the BMBF Federal Ministry of Education and Research (FKZ01GI1106 and 01GI1109B), Berlin, Germany; and the European Foundation for the Study of Diabetes. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Competing Interests: The authors have declared that no competing interests exist.

Citation: : Karges B, Rosenbauer J, Kapellen T, Wagner VM, Schober E, et al. (2014) Hemoglobin A1c Levels and Risk of Severe Hypoglycemia in Children and Young Adults with Type 1 Diabetes from Germany and Austria: A Trend Analysis in a Cohort of 37,539 Patients between 1995 and 2012. PLoS Med 11(10): e1001742.doi:10.1371/journal.pmed.1001742

Author Affiliations: RWTH Aachen University, GERMANY German Diabetes Center, Leibniz Center at University of Dusseldorf, GERMANY University of Leipzig, GERMANY University of Lubeck, GERMANY Medical University of Vienna, AUSTRIA University of Ulm, GERMANY



Contact: Beate Karges
RWTH Aachen University
GERMANY
+49 241 8080867
bkarges@ukaachen.de


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[Press-News.org] Hypoglycemia link to HbA1c has declined in type 1 diabetes