Posts Tagged ‘diabetes’

Diabetes and Depression Together Increase Risk For Heart Patients

Wednesday, March 10th, 2010

Having both depression and type 2 diabetes increases the risk of death for heart patients. Each factor had been known to increase the risk of heart disease deaths by itself, but together they’re even more deadly.

In an analysis of more than 900 patients with established coronary artery disease, Duke University Medical Center psychologists found that those with both type 2 diabetes and symptoms of depression were more likely to die than heart patients without those conditions.

The study showed that among type 2 diabetes patients, having high depression scores increased the risk of dying by 20 to 30 percent compared to patients with similar depression scores but no type 2 diabetes.

“We found a trend showing that the probability of death increases as the level of depression increases in diabetic patients with coronary artery disease,” said Duke researcher Anastasia Georgiades, Ph.D.  “Our data appear to show an important interaction between type 2 diabetes and depression, meaning that physicians should closely monitor their heart patients who have both of these disorders.”

“There is some sort of synergistic effect between type 2 diabetes and depression that we don’t fully understand,” Georgiades said. “In our analysis, we controlled for factors that could influence mortality, such as heart disease severity and age. For whatever reasons, these patients were still at higher risk of dying, and future research will aim to investigate the mechanisms for this association.” The research was supported by the National Heart, Lung, Blood Institute.

The researchers followed 933 heart patients for more than four years and correlated the 135 deaths that occurred during that period with the presence of type 2 diabetes and depression alone and together.

Georgiades said there are some possible explanations for the link between depression and diabetes.

“Patients with type 2 diabetes typically have an extensive self-care regimen involving special diet, medications, exercise and numerous appointments with their doctor,” she said. “It may be that such patients who are depressed might not be as motivated to carry out all these activities, thereby putting them at higher risk.”

Depression has also been linked to other cardiovascular risk factors such as insulin resistance, hypertension, obesity, increased cigarette smoking, alcohol abuse and physical inactivity.

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Antidepressants Linked To Type 2 Diabetes

Monday, February 1st, 2010

While analyzing data from Saskatchewan health databases, Lauren Brown, researcher with the U of A’s School of Public Health, found people with a history of depression had a 30 per cent increased risk of type 2 Diabetes.

Brown then studied the medical history of 2,400 people who were diagnosed with depression and were taking antidepressants to determine whether there was a clear correlation between that disease and type 2 Diabetes.

Brown divided the group into four categories: those who took antidepressants that were considered older therapies, patients who were using newer treatments, those using a combination of both an old and new treatments and people who were switching medications.

What she found was the risk of diabetes almost doubled for the patients who were using two types of therapies at the same time, tricyclic antidepressants (TCAs) and selective serotonin reuptake inhibitors (SSRIs). Brown says people are usually prescribed multiple medications “if they have severe depression or if they are having a problem finding the right therapy.”

Brown believes these results, and results of previous studies demonstrating an increased risk of type 2 diabetes in people with depression, emphasize the need for regular screening for type 2 diabetes in people with depression, particularly those taking more than one antidepressant. She also encourages diabetes and depression organizations to educate their members about this link.

This study was recently published in Diabetes Research & Clinical Practice.

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Depression and Diabetes

Thursday, November 5th, 2009

Depression Linked To Higher Death Rates From All Causes Among Elderly With Diabetes

In a large group of Medicare beneficiaries with diabetes, depression was associated with a higher death rate from all causes during a two-year study period.

Lead author Dr. Wayne Katon, professor of psychiatry and behavioral sciences at the University of Washington (UW), noted that previous research indicates that depression and diabetes is a potentially lethal mix among young to middle-aged patients. Depression also puts patients at greater risk of complications from their diabetes. This more recent study suggests that depression is also a risk factor for mortality in older patients with diabetes. Most Medicare beneficiaries, like the ones in this study, are over age 65. The mean age of the participants was 75.6 years.

The study tracked 10,704 Medicare beneficiaries with diabetes who were enrolled in a disease management program in Florida. They were surveyed at the start of the study with a health assessment questionnaire. Evidence of depression among members of the group came from physician diagnosis, patient reports of having a prescription for an antidepressant in the year before the survey, or patient answers to a brief screening test. For the next two years, the research team recorded the death and cause of death of participants through bi-monthly checks of Medicare claims and eligibility files, or from phone calls with the participants’ families.

The research team found that patients with both diabetes and depression had an increased risk of about 36 percent to 38 percent of dying from any cause during the two-year follow-up. Participants with a physician diagnosis of depression were significantly younger than their cohorts, more likely to be female, had more severe medical illness, were less likely to be African-American, and more likely to be Hispanic. These variables were controlled for in the analysis of increased risk. A total of 12.1 percent of participants who had both disorders died during that period. Among those without depression, 10.4 percent died.

Participants who had been treated with one or more antidepressant medications in the year before the study had a 24 percent increased risk of mortality, compared to non-depressed participants. According to the study authors, those patients may have been treated with antidepressants because their depressive symptoms were more severe and persistent than those of more mildly depressed patients who weren’t prescribed antidepressants.

There was no difference in the rate of cardiovascular or cerebrovascular events between those treated with antidepressants and those who had no indication of depression.

“Rates of mortality from vascular disease may be decreasing in recent years among patients with diabetes due to more aggressive treatment of high blood pressure, cholesterol, and glucose levels,” the researchers surmised, “as well as widespread use of preventative medications such as aspirin and beta blockers.”

According to the authors, there may be several reasons why depression worsens chronic diseases such as diabetes. Depression has been associated with inadequate self-care and harmful habits like smoking or overeating. Depression is also associated with nervous system and endocrine system problems, and with inflammatory markers.

The authors noted their study’s limitations: the participants were from one geographic region of the United States, and the follow-up period was relatively short. Defining depression in part by physician diagnosis and treatment, they added, may have selected for participants with more severe illness. The study was also not able to obtain information on education, income, weight, smoking habits, physical activity, or compliance in taking medication.

In addition to Katon, the researchers included Drs. Ming-Yu Fan and Jurgen Unutzer from the UW, Dr. Jennifer Taylor from Green River Health in Tampa, Fl.; Dr. Harold Pincus from Columbia University and the Rand Corporation; and Michael Schoenbaum from the National Institutes of Health (NIH) in Bethesda, Md.

Grants from the National Institute of Mental Health of the NIH funded the study. The findings are published in the October 2008 Journal of General Internal Medicine.

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More Evidence That Depression Is Hard On The Heart

Saturday, March 28th, 2009

Severe depression may silently break a seemingly healthy woman’s heart. Doctors have long known that depression is common after a heart attack or stroke, and worsens those people’s outcomes. Monday, Columbia University researchers reported new evidence that depression can lead to heart disease in the first place.

The scientists tracked 63,000 women from the long-running Nurses’ Health Study between 1992 and 2004. None had signs of heart disease when the study began, but nearly 8 percent had evidence of serious depression.

The depressed women were more than twice as likely to experience sudden cardiac death — death typically caused by an irregular heartbeat, concluded the 12-year study, published Monday in the Journal of the American College of Cardiology. They also had a smaller increased risk of death from other forms of heart disease.

The big surprise: Sudden cardiac death seemed more closely linked with antidepressant use than with the depression symptoms the women reported.

That might simply mean that women who used antidepressants were, appropriately, the most seriously depressed, cautioned lead researcher Dr. William Whang. But he said the finding merited more research.

Studies of the newer antidepressants most often used today so far haven’t signaled a risk of irregular heartbeat, and some even have suggested protection, noted Dr. Redford Williams of Duke University, a specialist in how psychosocial factors affect health.

The drug question aside, Williams said the work adds to growing evidence that depression is an independent risk factor for heart disease — on top of the classic risks of high blood pressure, diabetes, high cholesterol and smoking.

The predominantly white Nurses’ Health Study may underestimate it, Williams said. “If anything, the impact in African-American women is probably greater,” he said, adding that it’s time for the next step: A study testing whether properly treating depression lowers the risk.

Why might depression have that effect? The study found that the more severe the women’s reported depression symptoms, the more likely she was to have traditional heart risk factors. Also, stresses like depression have been linked to such physical effects as a higher resting heart rate.

Perhaps a more straightforward reason: Depression can make people do a worse job taking care of themselves. Indeed, the American Heart Association last year recommended that everyone who already has heart disease be regularly screened for depression — because depressed patients may skip their medications, sit indoors instead of exercising, and eat particularly poorly.

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