How "Bedside Manner" affects Self Care in Type 2 diabetes

The emotional context of self-management in chronic illness - A qualitative study of the role of health professional support in the self-management of type 2 diabetes
Original source: BMC Health Services Research 2008, 8:214
Authors: John Furler (corresponding author), Christine Walker, Irene Blackberry, Trisha Dunning, Nabil Sulaiman, James Dunbar, James Best, Doris Young
Publication date: 17 October 2008
DOI (digital document ID): 10.1186/1472-6963-8-214
Requires subscription? No
Publicly-available abstract: Yes

Synopsis:
One role of health-care professionals is to support patients with regard to both the clinical and emotional aspects of living with diabetes. The authors of this study tried to find approaches to make these professionals more effective at this task. They asked patients with Type 2 diabetes how they took care of their diabetes and how their relationships with their support teams affected this. They looked at groups who had been telephoned by nurses in the patients' general practitioners' offices to "coach" them about their diabetes and encourage them to become more actively-engaged their own health care and in their relationship with their family doctors. Their goal is to make these nurses more effective in this mission.

A total of 52 patients, ranging in age from 50-80, were split into four focus groups. Most of the participants were either unemployed or retired, and had had at least one visit with a diabetes educator. There were two English-language focus groups, plus one in Arabic and one in Turkish -- the two main languages of lower-income immigrants in the Melbourne, Australia urban area.

The groups focused on the role of personal control of diabetes and how one's relationships with one's healthcare team influenced this.

The investigators found that overall, the English speakers tended to see diabetes as life-limiting, almost punitive, and requiring self discipline. Dietary changes were viewed in terms of sacrifice -- for example, "having to give up" one's favorite foods. They looked at their entire care team as separate but equally important entities. They were more likely to "shop around" to find professionals who would give them "the right answers"; they needed information to be able to exert control their conditions.

Arabic and Turkish speakers saw diabetes as an integrated part of life, possibly indicative of stress. They saw self-management techniques as part of an integrated effort to restore personal calm. Dietary changes were put in a positive light -- using higher-quality foods rather than lesser quality ones, for example. They also relied primarily on their relationship with their General Practitioner, expecting him to provide them with all the information necessary to care for themselves. When they attended education sessions, or saw specialists, it was only upon the strong recommendation of their primary care physicians.

The investigators saw in the English-speakers the emerging concept of "patienthood", and doctor-patient relationships evolving to the ideal of the actively-engaged patient. (This is the model that is fostered by medical professional societies and by health insurers.) In contrast, they felt there was a potential danger in being completely uncritical of one's primary care physician, with the potential for insufficiently aggressive care and poorer long-term outcomes. The authors believe their findings suggest that a patient will see better results if his or her health-care professionals take the time to understand their patients' social, cultural, and emotional contexts and work from there to help them develop an effective approach to self care.

Reliability:
The study size was very small. The authors note that several aspects of its design could have skewed the results, and their specific results are not applicable outside of the particular community studied. The authors are a multidisciplinary group of professionals in medical practice, medical education, public health, and patient advocacy. The research was published in a peer-reviewed journal. The information should be considered more as a start-off point for your own relationships with your health-care team -- or if you are a practitioner, your patients.

Practical Applications:
There are many reasons that one's social and cultural background can either help or hinder self-care. I've often stated -- and even blogged -- that being willing to learn about the beliefs and cultural contexts of others, and by using those contexts as a starting point, the information or discussion you provide will be more easily understood, more appropriate to that other person, and where health information is concerned, more likely to get a positive response. I am encouraged to see this approach, and hope that it will improve diabetes care not just in Melbourne, but throughout the world.

This synopsis was based on the entire article.

One theory of increased colon cancer risk in Type 2 diabetes

Lack of association of colonic epithelium telomere length and oxidative DNA damage in Type 2 diabetes under good metabolic control
Original source: BMC Endocrine Disorders 2008, 8:12
Authors: Deepak Kejariwal (corresponding author), Karolina M Stepien, Tracy Smith, Hugh Kennedy, David A Hughes, and Mike J Sampson
Publication date: 10 October 2008
DOI (digital document ID): 10.1186/1472-6823-8-12
Requires subscription? No
Publicly-available abstract: Yes

Synopsis:
People with Type 2 diabetes are at greatly increased risk for developing colon cancer, but the reasons for this are not clear. One possible reason may be DNA damage and oxidative stress, which may or may not be related to high blood glucose levels. Telomeres are DNA repeat sequences at the ends of chomosomes that get shorter each time a cell divides. After a certain point, they become non-functional. This causes a chemical signal to go out to kill the cell, preventing the growth of tumors. If the chemical signal is missing, the cells will continue to divide and the chromosomes will become unstable. Eventually this instability and continued cell division can result in tumors. The loss of this signal is found in many cancers, including about half of all colorectal cancers.

Under oxidative stress, telomeres may shorten more quickly, and less accurately, than they might otherwise. The authors believed that the telomeres of people with Type 2 diabetes are more prone to the effects of oxidative stress than those without diabetes, and that the cells from their colons would show evidence of shorter telomeres, which would kick off a series of events leading to colorectal cancer.

People with lower-intestinal and colon disease were excluded from this study, as were those who took vitamins or fish oil. The patients controlled their diabetes by taking metformin, a sulfonylurea drug, both of those, or insulin. A total of 32 people were examined between the people with diabetes and the non-diabetic controls. None of the subjects were smokers. The diabetic subjects had A1c under 6.9% but were dealing with known complications of diabetes. Tissue samples were taken from the lower colon and examined for oxidative damage and telomere shortening.

There were no appreciable differences in telomere length between the two groups. However, the groups were small, and the greater number of people with diabetes taking aspirin, ACE inhibitors (anti-hypertension medication), and/or statins (to reduce high cholesterol levels) may have provided some level of protection. Other reasons a difference was not seen could be that the diabetic subjects were in good control of their blood glucose levels, and that 6.5 years may not be a long enough time with diabetes for the effects of oxidative stress and increased colon cancer risk to be measurable.

Reliability:
Two of the investigators associated with a University hospital. The research was published in a peer-reviewed journal. The sample size was extremely small, and though steps were taken to minimize its effects, this small a sample could cause a skewed set of results. The authors do suggest that further research is necessary to confirm or rule out their theory.

Practical Applications:
More research is needed to find out exactly why people with Type 2 diabetes are at higher risk of developing colon cancer, and ways of minimizing that additional risk.

This synopsis was based on the entire article.

Are adverse effects of some diabetes drugs related to their suppression of sex hormones?

Are the adverse effects of glitazones linked to induced testosterone deficiency?
Original source: Cardiovascular Diabetology 2008, 7:30
Authors: M. Carruthers (corresponding author), T. R. Trinick, E. Jankowska, and A.M. Traish
Publication date: 15 October 2008
DOI (digital document ID): 10.1186/1475-2840-7-30
Requires subscription? No
Publicly-available abstract: Yes

Synopsis:
The authors pose a theory that the various adverse effects of diabetes drugs in the class called "glitazones" -- including rosiglitazone (RGZ -- brand name Avandia) and pioglitazone (PGZ -- brand name Actos) -- may be related to a separate known action of these drugs -- their suppression of sex hormones. These side effects include heart disease, swelling, weight gain, and anemia.

Glitazones act on sex hormones by reducing the levels to which they are released and by making the body less sensitive to them. These sex hormones are responsible for directing new cell growth to become blood vessels, skin, muscle, and other types of structural cells, rather than fat cells. This might give further weight to an existing theory of how obesity might cause diabetes (called "Ungar's theory of the 'Lipocentric Pathway to Hyperglycemia'"(1)). The authors note evidence that low testosterone levels in men can cause a number of the same side effects that are being observed in diabetes patients treated with glitazones; furthermore, that diabetes and/or cardiovascular disease are often seen to develop where testosterone production has been suppressed in order to treat prostate cancer. Much of this can be tied to the abdominal weight gain related to low testosterone levels. Treatment with testosterone in these cases has been shown to reduce the side effects and lower the statistical occurrence of cardiovascular disease among patients showing a number of these metabolic symptoms.

The authors note a number of known effects of rosiglitazone and troglitazone (Resulin, which has been removed from the US market) on sex hormones and on the development and maturation of new body tissues.

The authors suggest that this hypothesis might be tested by double-blind, placebo-controlled clinical studies examining the endocrine profiles, and levels of sex hormones, in people with Type 2 diabetes both before and while/after being treated with a glitazone. Additionally, studies on treating diabetic men with testosterone might show us whether this might counteract (or at least lessen) the adverse effects of glitazones. They also suggest further research into exactly how glitazones inhibit sex hormones.

Reliability:
The authors are associated with a number of universities and medical research institutes throughout the world. The hypothesis was published in a peer-reviewed journal. The authors are posing a theory, rather than a statement of fact, and suggesting ways that others could determine whether or not their theory is correct.

Practical Applications:
If the theory is correct, and if administering testosterone to men can completely counteract the adverse effects of Avandia and similar medications, that would make Avandia a relatively safer choice to treat Type 2 diabetes than it is now.

For further reading:
(1) Roger H. Unger, MD Reinventing type 2 diabetes: pathogenesis, treatment, and prevention. Journal of the American Medical Association (JAMA), 2008;299(10):1185-1187.
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"Evidence-Based Medicine", Patient Pages, Journal of the American Medical Association (JAMA)

This synopsis was based on the entire article.