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Diabetes Issues Author: Staff Editor Last Updated: Dec 17, 2013 - 10:41:17 AM

Duration of Diabetes and Advancing Age Independently Predict Diabetes Complications and Risk of Death

By Staff Editor
Dec 17, 2013 - 10:36:27 AM

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( - OAKLAND, Calif., Dec. 17, 2013  -- The duration of diabetes, as well as advancing age, independently predict diabetes severity and risk of death for older adults with type 2 diabetes, according to a study published online in JAMA Internal Medicine.

In this study led by Kaiser Permanente and the University of Chicago, researchers investigated contemporary rates of diabetes complications and risk of death, then contrasted them across categories of age and duration of diabetes. More than 72,000 patients aged 60 or older with type 2 diabetes were drawn from the Kaiser Permanente Northern California Diabetes Registry.

"The need to individualize care for older patients with diabetes is widely accepted. However, the current approaches do not adequately account for risk differences by age or duration," said senior author Andrew J. Karter, PhD, a senior research scientist with the Kaiser Permanente Division of Research. "For example, the risk of hypoglycemia rose markedly and independently with advancing age and duration of diabetes. This finding is notable because hypoglycemia is known to be caused by the treatment for diabetes. It concerns us that one of the most common negative outcomes in diabetes is a side effect of treatment."

The researchers assessed acute hyperglycemic (high blood sugar) and hypoglycemic (low blood sugar) events; microvascular complications such as end-stage kidney disease, diseases of blood vessels outside the heart and brain, lower extremity amputation and advanced eye disease; cardiovascular complications such as coronary artery disease, cerebrovascular disease or stroke and congestive heart failure; and all causes of death related to diabetes.

For a given age group, rates of each outcome, particularly hypoglycemia and microvascular complications, increased dramatically with longer duration. However, for a given duration of diabetes, rates of hypoglycemia, cardiovascular complications and death increased steeply with advancing age, while rates of microvascular complications remained stable or declined.

"Many older patients are living longer with their diabetes, and longer duration of diabetes is associated with more complications and more difficulty with maintaining glycemic control," said lead author Elbert S. Huang, MD, MPH, of the University of Chicago. "Understanding the contemporary clinical course of diabetes in older patients is the critical first step needed to individualize and prioritize care, and target support for future research efforts."

The researchers say these findings suggest the need for increased clinical and research focus on reducing and understanding the incidence of hypoglycemia for older adults with diabetes. For policymakers, the study provides important data that may be used for projecting health care expenditures for a large and growing segment of the Medicare population. More importantly, the data from this study may inform the design and scope of public policy interventions that meet the unique needs of those who live with the disease.

This research is part of Kaiser Permanente's body of work focused on better understanding diabetes. Earlier this year, Kaiser Permanente researchers found that patients with diabetes who take certain types of medications to lower their blood sugar sometimes experience severe low blood-sugar levels, whether or not their diabetes is poorly or well controlled.

Additional authors on the study include Jennifer Y. Liu, MPH, and Howard H. Moffet, MPH, of the Kaiser Permanente Division of Research in Oakland, Calif.; Neda Laiteerapong, MD, MS, and Priya M. John, MPH, of the Section of General Internal Medicine at the University of Chicago.

About the Kaiser Permanente Division of Research
The Kaiser Permanente Division of Research conducts, publishes and disseminates epidemiologic and health services research to improve the health and medical care of Kaiser Permanente members and the society at large. It seeks to understand the determinants of illness and well-being and to improve the quality and cost-effectiveness of health care. Currently, the Division's 550+ staff are working on more than 350 ongoing research studies in behavioral health and aging, cancer, cardiovascular and metabolic conditions, health care delivery and policy, infectious diseases, vaccine safety and effectiveness, and women's and children's health. For more information, visit

About Kaiser Permanente
Kaiser Permanente is committed to helping shape the future of health care. We are recognized as one of America's leading health care providers and not-for-profit health plans. Founded in 1945, our mission is to provide high-quality, affordable health care services and to improve the health of our members and the communities we serve. We currently serve 9.1 million members in eight states and the District of Columbia. Care for members and patients is focused on their total health and guided by their personal physicians, specialists and team of caregivers. Our expert and caring medical teams are empowered and supported by industry-leading technology advances and tools for health promotion, disease prevention, state-of-the-art care delivery and world-class chronic disease management. Kaiser Permanente is dedicated to care innovations, clinical research, health education and the support of community health. For more information, go to:

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