Weight loss does not lower heart disease risk from type 2 diabetes
Intervention stopped early in NIH-funded study of weight loss in overweight and obese adults with type 2 diabetes after finding no harm, but no cardiovascular benefits
An intensive diet and exercise program resulting in weight loss does not reduce cardiovascular events such as heart attack and stroke in people with longstanding type 2 diabetes, according to a study supported by the National Institutes of Health.
The Look AHEAD (Action for Health in Diabetes) study tested whether a lifestyle intervention resulting in weight loss would reduce rates of heart disease, stroke, and cardiovascular-related deaths in overweight and obese people with type 2 diabetes, a group at increased risk for these events.
Researchers at 16 centers across the United States worked with 5,145 people, with half randomly assigned to receive an intensive lifestyle intervention and the other half to a general program of diabetes support and education. Both groups received routine medical care from their own health care providers.
Although the intervention did not reduce cardiovascular events, Look AHEAD has shown other important health benefits of the lifestyle intervention, including decreasing sleep apnea, reducing the need for diabetes medications, helping to maintain physical mobility, and improving quality of life. Previous Look AHEAD findings are available at www.lookaheadtrial.org.
"Look AHEAD found that people who are obese and have type 2 diabetes can lose weight and maintain their weight loss with a lifestyle intervention," said Dr. Rena Wing, chair of the Look AHEAD study and professor of psychiatry and human behavior at Brown University. "Although the study found weight loss had many positive health benefits for people with type 2 diabetes, the weight loss did not reduce the number of cardiovascular events."
Data are currently being analyzed to fully understand the cardiovascular disease results. Investigators are preparing a report of the findings for a peer-reviewed publication.
Few, if any, studies of this size and duration have had comparable success in achieving and maintaining weight loss. Participants in the intervention group lost an average of more than 8 percent of their initial body weight after one year of intervention. They maintained an average weight loss of nearly 5 percent at four years, an amount of weight loss that experts recommend to improve health. Participants in the diabetes support and education group lost about 1 percent of their initial weight after one and four years.
In September 2012, the NIH stopped the intervention arm, acting on the recommendation of the study's data and safety monitoring board. The independent advisory board, charged with monitoring the study data and safety of participants, found that the intensive lifestyle did no harm but did not decrease occurrence of cardiovascular events, the primary study goal. At the time, participants had been in the intervention for up to 11 years.
Because there was little chance of finding a difference in cardiovascular events between the groups with further intervention, the board recommended stopping the intensive lifestyle intervention, but encouraged the study to continue following all Look AHEAD participants to identify longer-term effects of the intervention.
"The intervention group did not have fewer cardiovascular events than the group receiving general diabetes support and education, but one positive factor we saw was that both groups had a low number of cardiovascular events compared to previous studies of people with diabetes," said Dr. Mary Evans, director of Special Projects in Nutrition, Obesity, and Digestive Diseases within the NIH's National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), the study's primary sponsor.
Type 2 diabetes—affecting nearly 24 million people in the United States alone—has increased in prevalence along with the country's epidemic of overweight and obesity. Cardiovascular diseases are the most common cause of death among people with type 2 diabetes. Look AHEAD is the first study to examine the long-term effects of a lifestyle intervention on major cardiovascular disease events and death in adults with type 2 diabetes.
"Look AHEAD provides important, definitive information about the long-term health effects of weight loss in people with type 2 diabetes," said NIDDK Director Dr. Griffin P. Rodgers. "Beyond cardiovascular disease, this study and others have shown many other health benefits of weight loss through improved diet and increased physical activity. For example, for overweight and obese adults at high risk for diabetes, modest weight loss has been shown to prevent or delay developing type 2 diabetes."
Participants were 45 to 76 years old when they enrolled in the study. Sixty percent of enrollees were women. More than 37 percent were from racial and ethnic minority groups. Researchers are now analyzing data to measure effects of the lifestyle intervention on subgroups, including racial and ethnic groups and people with a history of cardiovascular disease.
- Lifestyle intervention improves risk factors in type 2 diabetes Oct 02, 2010 | not rated yet | 0
- Lifestyle intervention for overweight patients with diabetes provides long-term benefits Sep 27, 2010 | not rated yet | 0
- Weight loss and increased fitness slow decline of mobility in adults Mar 28, 2012 | not rated yet | 0
- Linking weight loss to less sleep apnea Sep 28, 2009 | not rated yet | 0
- With a little exercise, your fat cells may coax liver to produce 'good' cholesterol Oct 09, 2012 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Solvability of a circuit
2 hours ago Let's say I have a circuit consisting only of a finite number of batteries and resistors, all ideal. Given an arbitrary shape of this circuit, will I...
Question about perception of colors around light sources
5 hours ago When I look at a distant light source (like car headlights, or street lamp lights) I notice colors of the visible spectrum (as separated (as in after...
Does a charged particle rotate when traveling through a static Bf?
7 hours ago I have been looking at mass spectrometers, in particular the interactions between the Bf ind of a charged particle in motion in a static Bf of the...
Find a link between physics and assignment problems
8 hours ago Hi ! I've been working about assignments problems and how to solve them. I will have to do a presentation about it in few weeks. However, I'll...
Light as a source of electricity
8 hours ago Hello Dear Fellows! We all know that light is an electromagnetic wave and also we know that an antenna receives EM waves and...
A question about the energy stored in a capacitor.
8 hours ago If we imagine a simple circuit with a battery and a capacitor with negligible internal resistance, the capacitor is charged up to a point where the...
- More from Physics Forums - Classical Physics
More news stories
(HealthDay)—Moderate aerobic exercise prevents fructose-induced hypertriglyceridemia in healthy males, according to a study published online May 14 in Diabetes.
Diabetes May 17, 2013 | 5 / 5 (1) | 0 |
A DNA variant near a digestive enzyme does not only affect risk of developing diabetes but also affects the response to treatment, an international consortium of researchers including the University of Dundee has found.
Diabetes May 17, 2013 | not rated yet | 0 |
(Medical Xpress)—Development of a sophisticated artificial pancreas holds potential to transform the lives of patients with Type 1 diabetes.
Diabetes May 16, 2013 | 5 / 5 (1) | 0 |
A small University at Buffalo study has found for the first time that in Type 1 diabetics, insulin injections exert a strong anti-inflammatory effect at the cellular and molecular level, while even small amounts of glucose ...
Diabetes May 16, 2013 | not rated yet | 0
(HealthDay)—Home diabetes regimens partially explain the increased risk of having a hypoglycemia event during hospitalization among older African-American men with diabetes, according to a study published ...
Diabetes May 14, 2013 | not rated yet | 0
Researchers at the University of Wisconsin have identified a potential new risk factor for obstructive sleep apnea: asthma. Using data from the National Institutes of Health (Heart, Lung, and Blood Institute)-funded Wisconsin ...
7 hours ago | not rated yet | 0 |
In their quest to learn more about the variability of cells between and within tissues, biomedical scientists have devised tools capable of simultaneously measuring dozens of characteristics of individual ...
8 hours ago | 5 / 5 (2) | 0 |
A new study looking at sleep-disordered breathing (SDB) and markers for Alzheimer's disease (AD) risk in cerebrospinal fluid (CSF) and neuroimaging adds to the growing body of research linking the two.
7 hours ago | 5 / 5 (1) | 0 |
Scientists at Johns Hopkins have turned their view of osteoarthritis (OA) inside out. Literally. Instead of seeing the painful degenerative disease as a problem primarily of the cartilage that cushions joints, ...
8 hours ago | 5 / 5 (3) | 0 |
The hunt for an HIV vaccine has gobbled up $8 billion in the past decade, and the failure of the most recent efficacy trial has delivered yet another setback to 26 years of efforts.
12 hours ago | not rated yet | 0
Gourmands and foodies everywhere have long recognized ginger as a great way to add a little peppery zing to both sweet and savory dishes; now, a study from researchers at Columbia University shows purified components of the ...
7 hours ago | not rated yet | 0