Youth with type 2 diabetes develop complications more often than type 1 peers
NIH, CDC funded study finds many in both groups quickly develop kidney, nerve, eye diseases.
Teens and young adults with type 2 diabetes develop kidney, nerve, and eye diseases – as well as some risk factors for heart disease – more often than their peers with type 1 diabetes in the years shortly after diagnosis. The results are the latest findings of the SEARCH for Diabetes in Youth study, published Feb. 28 in the Journal of the American Medical Association.
Funded by the National Institutes of Health (NIH) and the Centers for Disease Control and Prevention (CDC), SEARCH researchers examined how quickly and often youth developed signs of kidney, nerve and eye diseases, among the most common complications of diabetes. They also measured several risk factors for heart disease. Participants had diabetes an average of under eight years at the end of the study.
The study is the largest of its kind in the United States. Key findings are:
- For youth with type 2 diabetes, nearly 20 percent developed a sign of kidney disease by the end of the study, compared to about 6 percent of youth with type 1 diabetes.
- For youth with type 2, about 18 percent developed nerve disease, versus about 9 percent with type 1.
- For youth with type 2, about 9 percent developed eye disease, compared to about 6 percent of youth with type 1.
- Measures for two risk factors for heart disease (hypertension and arterial stiffness) were greater for youth with type 2 but close to equal for a third risk factor (cardiovascular autonomic neuropathy).
Though youth with type 2 diabetes showed signs of complications more often in nearly every measure than their peers with type 1, many youth in both groups developed complications.
“There’s often the assumption that young people don’t develop complications from diabetes, but that’s just not true. We saw that young people with diabetes are developing signs of major complications in the prime of their lives,” said Dr. Barbara Linder, a study author and senior advisor for childhood diabetes research within the NIH’s National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). “Particularly for youth with type 2, this research demonstrates the clear need to learn how to reduce or delay the debilitating complications of diabetes, itself a huge challenge for young people to manage.”
SEARCH examined 1,746 youth with type 1 diabetes (averaging about 18 years old) and 272 with type 2 diabetes (average age about 22) between 2002-2015. All were diagnosed before age 20. Youth were identified at five clinical centers – Kaiser Permanente Southern California in Pasadena, University of Colorado in Denver, Cincinnati Children’s Hospital Medical Center, University of North Carolina at Chapel Hill, and Seattle Children’s Hospital. Wake Forest University in Winston-Salem, North Carolina, served as coordinating center.
The researchers looked at factors including glucose control, body mass index, waist-to-height ratio and blood pressure, but no factor could explain why people with type 2 developed more complications than counterparts with type 1.
By about age 21, about 1/3 of participants with type 1 diabetes and about 3/4 of participants with type 2 had at least one complication from diabetes or were at high risk for a complication.
“This study highlights the need for early monitoring for development of complications among young people with diabetes,” said Dr. Sharon Saydah, senior scientist at CDC and an author on the paper. “If young people can delay onset of these complications from diabetes by even a few years, that can ease their burden and lengthen their lives.”
Type 1 diabetes typically develops in young people. In type 1, the body does not make insulin, a hormone needed to live. In type 2 diabetes, the body does not make enough insulin or does not use insulin well. In the past, type 2 diabetes was extremely rare in youth, but occurrences have risen alongside the obesity epidemic. Find health information on diabetes at https://www.niddk.nih.gov/health-information/diabetes.
About the CDC: CDC works 24/7 saving lives and protecting people from health threats to have a more secure nation. Whether these threats are chronic or acute, manmade or natural, human error or deliberate attack, global or domestic, CDC is the U.S. health protection agency.
The NIDDK, part of the NIH, conducts and supports basic and clinical research and research training on some of the most common, severe, and disabling conditions affecting Americans. The Institute’s research interests include: diabetes and other endocrine and metabolic diseases; digestive diseases, nutrition, and obesity; and kidney, urologic, and hematologic diseases. For more information, visit www.niddk.nih.gov.
About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit www.nih.gov.
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