Source: AMA Morning Rounds 12/22/09
Wednesday, January 6, 2010
Breast-feeding may benefit a woman's heart.
Source: AMA Morning Rounds 12/22/09
Antidepressants' effectiveness may vary according to severity of depression.
Source: AMA Morning Rounds 1/6/10
Antidepressants' effectiveness may vary according to severity of depression.
Tuesday, January 5, 2010
Cutting global warming said to lead to positive health effects.
Source: AMA Morning Rounds 12/28/09
Cutting global warming said to lead to positive health effects.
Bedside exam may be superior to CT in detecting post-brain surgery complications.
Source: AMA Morning Rounds 12/29/09
Bedside exam may be superior to CT in detecting post-brain surgery complications.
Monday, January 4, 2010
Gingko biloba not effective in preventing cognitive decline, improving memory.
Source: AMA Morning Rounds 12/30/09; JAMA. 2009; 302:2663-2670
Gingko biloba not effective in preventing cognitive decline, improving memory.
Ginkgo biloba for Preventing Cognitive Decline in Older Adults
A Randomized Trial
JAMA. 2009;302(24):2663-2670.
Context The herbal product Ginkgo biloba is taken frequently with the intention of improving cognitive health in aging. However, evidence from adequately powered clinical trials is lacking regarding its effect on long-term cognitive functioning.
Objective To determine whether G biloba slows the rates of global or domain-specific cognitive decline in older adults.
Design, Setting, and Participants The Ginkgo Evaluation of Memory (GEM) study, a randomized, double-blind, placebo-controlled clinical trial of 3069 community-dwelling participants aged 72 to 96 years, conducted in 6 academic medical centers in the United States between 2000 and 2008, with a median follow-up of 6.1 years.
Intervention Twice-daily dose of 120-mg extract of G biloba (n = 1545) or identical-appearing placebo (n = 1524).
Main Outcome Measures Rates of change over time in the Modified Mini-Mental State Examination (3MSE), in the cognitive subscale of the Alzheimer Disease Assessment Scale (ADAS-Cog), and in neuropsychological domains of memory, attention, visual-spatial construction, language, and executive functions, based on sums of z scores of individual tests.
Results Annual rates of decline in z scores did not differ between G biloba and placebo groups in any domains, including memory (0.043; 95% confidence interval [CI], 0.034-0.051 vs 0.041; 95% CI, 0.032-0.050), attention (0.043; 95% CI, 0.037-0.050 vs 0.048; 95% CI, 0.041-0.054), visuospatial abilities (0.107; 95% CI, 0.097-0.117 vs 0.118; 95% CI, 0.108-0.128), language (0.045; 95% CI, 0.037-0.054 vs 0.041; 95% CI, 0.033-0.048), and executive functions (0.092; 95% CI, 0.086-0.099 vs 0.089; 95% CI, 0.082-0.096). For the 3MSE and ADAS-Cog, rates of change varied by baseline cognitive status (mild cognitive impairment), but there were no differences in rates of change between treatment groups (for 3MSE, P = .71; for ADAS-Cog, P = .97). There was no significant effect modification of treatment on rate of decline by age, sex, race, education, APOE*E4 allele, or baseline mild cognitive impairment (P > .05).
Conclusion Compared with placebo, the use of G biloba, 120 mg twice daily, did not result in less cognitive decline in older adults with normal cognition or with mild cognitive impairment.
Trial Registration clinicaltrials.gov Identifier: NCT00010803
Author Affiliations: Departments of Neurology (Drs Snitz, Saxton, Lopez, and DeKosky and Ms Dunn) and Epidemiology (Ms Ives), University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Biostatistics, University of Washington, Seattle (Drs O’Meara and Arnold); Department of Mental Health, Johns Hopkins Medical Institutions, Baltimore, Maryland (Dr Carlson); Departments of Psychiatry and Behavioral Medicine (Dr Rapp) and Internal Medicine (Geriatrics/Gerontology), School of Medicine (Dr Sink), Wake Forest University, Winston-Salem, North Carolina; and School of Medicine, University of Virginia, Charlottesville (Dr DeKosky).
Tuesday, December 8, 2009
Women urged to seek STD testing within 12 months of first intercourse.
Women urged to seek STD testing within 12 months of first intercourse.
Sunday, December 6, 2009
Diabetes cases projected to nearly double in next 25 years.
Diabetes cases projected to nearly double in next 25 years.
Pharmacists seen as integral to helping patients manage healthcare.
Source: AMA Morning News 11/20/09
Pharmacists seen as integral to helping patients manage healthcare.
Many medical students sustain needle-stick injuries, data indicate.
Source: AMA Morning Rounds 11/30/09
Many medical students sustain needle-stick injuries, data indicate.
Study shows no link between increased cell phone use, brain cancer incidence.
Source: AMA Morning Rounds 12/4/09
Study shows no link between increased cell phone use, brain cancer incidence.
Sunday, November 29, 2009
Lack of diabetes knowledge in USA
Source: AMA Morning Rounds 11/3/09
Useful Information:
Your Doctor!
http://www.diabetes.org/
http://diabetes.webmd.com/
http://www.nlm.nih.gov/medlineplus/diabetes.html
Survey suggests many Americans may lack basic knowledge about diabetes.
HealthDay (11/2, Gordon) reported that, according to a survey by the American Diabetes Association, "many Americans lack basic knowledge about" diabetes, a disease "responsible for more deaths each year in the" US "than breast cancer and AIDS combined." The ADA survey "included 2,081 men and women from across the" US, "285 of" whom "been diagnosed with diabetes," finding that one common myth "is that sugar and overeating cause diabetes." However, type 1 diabetes is "an autoimmune disease in which the body mistakenly attacks the islet cells in the pancreas, destroying the body's ability to produce insulin," and "genetics and other unknown factors -- not just diet -- can be contributors" to type 2 diabetes.
BPA
Source: AMA Morning Rounds
Variety of foods found to contain dangerous levels of BPA.
The Los Angeles Times (11/3, Zajac) reports that a survey released Monday by the consumer advocacy group Consumers Union "has found measurable levels of the chemical additive bisphenol A (BPA) across a range of foods, including some that were labeled 'BPA free.'" According to the analysis, "children eating multiple servings of some of the tested food could get doses of BPA 'near levels that have caused adverse effects in several animal studies.'" In a letter to FDA Commissioner Margaret Hamburg, the group said that the findings "bolster the case for banning BPA from use in materials that come in contact with food and beverages." Although the FDA "had no immediate comment," a spokesman "noted that a review of existing evidence about BPA's health effects was nearly completed and that Hamburg would 'make a decision how to proceed' by the end of the month."
In his column in the New York Times (11/8, WK10), Nicholas Kristof noted a recent report by Consumer Reports in which they "tested an array of brand-name canned foods...and found BPA in almost all of them." He asks, "Should we be alarmed? The chemical industry doesn't think so." But "more than 200...studies have shown links between low doses of BPA and adverse health effects." Recently the Endocrine Society "warned...that these kinds of abnormalities may be a consequence of the rise of endocrine-disrupting chemicals, and it specifically called on regulators to re-evaluate BPA." And now the FDA -- which "has generally been asleep at the wheel -- is studying the issue again. Bills are also pending in Congress to ban BPA from food and beverage containers." On BPA, Kristof decided, "While the evidence isn't conclusive, it justifies precautions."
NIH grants $30 million to BPA research.
USA Today (10/29, Szabo) reports, "The National Institutes of Health will devote $30 million to study the safety of bisphenol A, or BPA, an estrogen-like chemical used in many plastics." Robin Mackar, spokeswoman for the National Institute of Environmental Health Sciences (NIEHS), said that "almost half of that money comes from the economic stimulus bill." Previously, animal studies linked "BPA with infertility, weight gain, behavioral changes, early onset puberty, prostate and breast cancer and diabetes. New research will focus on low-dose exposures to BPA and effects on behavior, obesity, diabetes, reproductive disorders, asthma, cardiovascular diseases and various cancers." NIEHS director Linda Burnbaum said, "We know that many people are concerned about bisphenol A and we want to support the best science we can to provide the answers."
Public health impact of strategies to reduce greenhouse gas emissions
Source: WHO, http://www.who.int/globalchange/news/2009/greenhouse_25112009/en/index.html
London and Washington D.C.
Public health impact of strategies to reduce greenhouse gas emissions
Different mitigation strategies are likely to have different implications for health. For example, how much would a move to low carbon sources of power improve public health by reducing air pollution? What could be the health benefits of encouraging people to cycle and walk rather than take the car? Could improved biomass cook stoves in developing countries have impacts on child and maternal health as well as greenhouse gas emissions?
In the first major study of its kind, an international team of researchers in collaboration with WHO, have been modelling the health effects of different policies to reduce greenhouse gas emissions in high and low-income countries. Case studies focus on four key sectors: power generation, transport, household energy, and food and agriculture. The study findings will be published in a special issue in the Lancet in November 2009.
The results were launched at events in London and Washington on 25 November 2009.
Related links
- Dr Margaret Chan, editorial - Cutting Carbon, Improving Health [pdf 91kb]- The Health benefits of tackling climate change
An executive summary for the Lancet series
- The Wellcome Trust
- The London School of Hygiene & Tropical Medicine
Keeping cholesterol in check may reduce prostate cancer risk, studies suggest.
Source: AMA Morning Rounds 11/4/09
Keeping cholesterol in check may reduce prostate cancer risk, studies suggest.
The AP (11/4, Marchione) reports, "Men may protect more than their hearts if they keep cholesterol in line: Their chances of getting aggressive prostate cancer may be lower." Scientists at two institutions detailed the research that led them to that conclusion in Cancer Epidemiology Biomarkers & Prevention. Even though the papers "are not definitive and have some weaknesses," they do "fit with plenty of other science suggesting that limiting fats in the bloodstream can lessen cancer risk."
HealthDay (11/3, Edelson) reported that NCI investigators reviewed "data from a study that has followed more than 29,000 Finnish men for 18 years," finding that "cholesterol levels below the generally recommended 200 milligrams per deciliter were associated with an 18 percent higher overall risk of cancer."
Generic drug use can help save money
Source: AMA Morning Rounds 11/5/09
Asking physicians about generic drugs seen as key to cutting prescription costs.
The AP (11/5, Perrone) reports, "The senior advocacy group AARP reports that prices for the most popular drugs rose 8.7 percent on average last year, more than twice the rate of inflation." And "last year, pharmaceutical companies spent more than $4 billion urging patients like you to 'ask your doctor' about their drugs. But, if you want a prescription that won't empty your wallet, while still keeping you well, you might start asking your doctor about drugs you don't see on TV." For instance, "AstraZeneca's acid reflux drug Nexium [esomeprazole magnesium] -- the 'purple pill' -- was the second best-selling drug in the US last year, with a hefty price tag of about $215 per month. But, a drug from the same family, that works the same way, is available over-the-counter for about $20 a month as Prilosec [omeprazole]."
Early morning colonoscopies may detect more polyps than those done later.
Source: AMA Morning Rounds 11/9/09
Early morning colonoscopies may detect more polyps than those done later.
HealthDay (11/6, Preidt) reported, "Early morning colonoscopies detect more polyps than colon cancer screenings done later in the day," according to a study published in the Nov. issue of Clinical Gastroenterology and Hepatology. The study of "477 people who had colonoscopies in a one-year span" showed that screenings "that started at 8:30 a.m. or earlier detected 27 percent more polyps per patient than colonoscopies performed at a later time."
Furthermore, researchers appeared to find "fewer polyps...hour by hour as the day progresses," WebMD (11/6, Hendrick) reported. The investigators speculated that "more polyps are found early in the day" because of "better bowel preparation the night before by patients," and "fatigue of physicians and assistants."
Death and Dying
Death and dying
Jane Smith, deputy editor, BMJ
jsmith@bmj.com
The main theme of this weeks issue is death and dying, a subject where the public and the private jostle uncomfortably. This weeks BMJ contains several articles that add to the debate about public policy and throw light on to the nuances of private thoughts and behaviour.
Dutch law on euthanasia requires that the doctor must be convinced that the patient who requests euthanasia has unbearable suffering. In their qualitative study H R W Pasman and colleagues explored what this concept meant for patients whose request for euthanasia was either refused or granted but not carried out, and for their doctors (doi:10.1136/bmj.b4362). They found that doctors had a narrower view of unbearable suffering than patients, tending to concentrate on physical suffering. In some cases doctors thought that the suffering was not unbearable because patients behaved in a way that didnt seem compatible with unbearable suffering, such as reading books. Patients emphasised psychosocial suffering, such as fear of dependence, not being able to do ordinary things, and deterioration. < P> This difference is illustrated in Alex Patons moving account of the death of his wife (doi:10.1136/bmj.b4982): "She wanted to die, and we realised she meant it...a keen plantswoman, she said there was no point in living if she could no longer garden." Yet she was resuscitated in spite of an advance directive, and her family signed her out of hospital against medical advice, to die at home. Paton also argues for care with words, preferring "euthanasia...the bringing about of a gentle and easy death" to "assisted suicide...which continues the myth that euthanasia is a nasty business."
Another article in this weeks issue shows how private acts and thoughts can reach the public stage. Debbie Purdy writes in her patients journey about having multiple sclerosis and how she has come to terms with increasing loss of function (doi:10.1136/bmj.b4470). Her main point is the importance of making her "own choices about what constitutes an acceptable quality of life" rather than having others, including professionals, make assumptions about what that is. She says it was this desire that led her to campaign to ensure that "assisted death is part of the support available to patients who are suffering unbearably"—alluding to her very public fight to be allowed to control the manner of her dying. Debbie Purdy hasnt managed to change English law to allow assisted dying, but as a result of her court cases the House of Lords directed the Director of Public Prosecutions to publish his guidance on the factors that would prompt or argue against prosecution in individual cases.
That guidance was published in September and is now being consulted on. Richard Huxtable and Karen Forbes discuss some of the imponderables in their editorial (doi:10.1136/bmj.b4900), concluding that this guidance has not really clarified things for doctors or made end of life decisions and discussions easier. They fear "stealth lawmaking," where the law slides "from an apparent prohibition to a de facto position of permission."
Yet end of life decisions are already unstraightforward, as the ethical debate led by Stephen Bonner and colleagues illustrates (doi:10.1136/bmj.b4667). They were faced with a woman, unconscious as a result of attempted suicide, who had written an advance directive five years earlier saying she did not want life sustaining medical treatment. Should the directive be followed or should the emergency department staff initiate life saving treatment? Read the article, and its commentaries, to find out what they did, and what others think about it.
Cite this as: BMJ 2009;339:b5044
Non-profit reports breakthrough in understanding chronic fatigue syndrome.
Source: AMA Morning Rounds 11/12/09
Non-profit reports breakthrough in understanding chronic fatigue syndrome.
The New York Times (11/12, SPG8, Grady) reports that the Whittemore Peterson Institute for Neuro-Immune Disease, a nonprofit in Reno, recently had a breakthrough in understanding chronic fatigue syndrome. The Institute was founded by Harvey and Annette Whittemore "out of desperation to find answers" for their daughters condition. Instead of "doling out money to far-flung researchers," the Whittemores "wanted to employ their own scientists who would be devoted full time to the cause." They hired Dr. Judy A. Mikovits, a virus expert from the National Cancer Institute, who discovered that a retrovirus called XMRV, "may cause or at least contribute to chronic fatigue syndrome." Other doctors have "emphasized that more research was needed," and the Centers for Disease Control and Prevention will "try to replicate the XMRV findings." The CDC's Dr. William C. Reeves, "has said that he does not expect to find the virus in blood samples from patients."
Scientists find link between gut microbiota, diet, and weight gain.
Source: AMA Morning Rounds 11/12/09
Scientists find link between gut microbiota, diet, and weight gain.
The Los Angeles Times (11/12, Maugh) reported, "A high-fat, high-sugar diet does more than pump calories into your body. It also alters the composition of bacteria in your intestines, making it easier to gain weight and harder to lose it," according to a new paper in Science Translational Medicine. What's more, the "changeover can happen in as little as 24 hours."
Technically known "as the gut microbiota," intestinal "microbes perform a vast range of vital functions, including helping to regulate the calories the body obtains from food and stores as fat," according to Time (11/12, Park). Through earlier experiments, however, Washington University researchers found that the "gut microbiota of obese mice...have significantly more of one main type of bacteria called Firmicutes, and fewer of another kind called Bacteroidetes (both types populate human guts as well); in normal mice, the distribution is the opposite." With that in mind, the team devised a new study in which human microbiota was used "to colonize mice guts." The rodents were then fed "equivalents of typical human diets to see how their microbes -- and their weight -- might change."
Lead investigator Dr. Jeffrey I. Gordon told HealthDay (11/11, Gordon) that when his team "switched these humanized animals [from a low-fat] to a junk-food diet, high in fat with lots of simple sugars, the structure of the microbial community changed dramatically and very rapidly." What's more, the mice "became obese on Western diets." Investigators also discovered that "the microbiota passes from generation to generation."
Study points to chewing gum as weight loss aid. The Washington Post (11/11, Huget) reports that for anybody trying to lose weight, "taking up gum-chewing might not be a bad idea," as "there's actually a bit of scientific evidence showing that chewing gum helps fight fat in a number of ways." The research, sponsored by the Wrigley Science Institute, has suggested "that chewing gum may help reduce cravings, particularly for sweet snacks, and spur people to cut their daily intake by about 50 calories." The findings were presented at the annual scientific meeting of the Obesity Society last month, and "showed that gum-chewing people consumed 67 fewer calories at lunch and didn't compensate by eating more later in the day."
Breastfeeding's effect on postpartum weight discussed. The New York Times (11/12, E3, Louis) reports, "That breastfeeding gives mothers an edge shedding baby weight has long been suspected." A Danish study published last year showed that "the more a mother breast-feeds, the less weight she retains six months after birth." But, other research has shown that "breast-feeders don't necessarily shed fat quicker than women who feed their newborns formula." Meanwhile, "a small double-blind randomized study conducted at Cincinnati Children's Hospital Medical Center found that non-lactating women lost more body fat than lactating women at six months, and at a faster rate." Still, "others suggest that women who view breast-feeding as a dieting tool may have 'deeper body issues.'" One expert said "she was troubled by our cultural preoccupation with postpartum weight."
Dark chocolate may lower stress hormone levels.
Source: AMA Morning Rounds 11/13/09
Dark chocolate may lower stress hormone levels.
HealthDay (11/12, Dotinga) reported that "a dose of dark chocolate could cheer you right up by lowering your stress hormone levels," according to a study published online in the Journal of Proteome Research. After following 30 "volunteers who said they were highly stressed," researchers found that "a daily consumption of 40 grams [1.4 ounces] during a period of two weeks is sufficient to modify the metabolism of healthy human volunteers" by helping "correct other imbalances in the body that are related to stress." Reuters (11/13, Goldsmith) and also covers the story.