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July 10, 2006, 6:57 AM CT

Why Do Statistics About Overweight And Obesity Differ?

Why Do Statistics About Overweight And Obesity Differ?
The definitions or measurement characteristics for overweight and obesity have varied over time, from study to study, and from one part of the world to another. The varied definitions affect prevalence statistics and make it difficult to compare data from different studies. Prevalence refers to the total number of existing cases of a disease or condition in a given population at a given time. Some overweight- and obesity-related prevalence rates are presented as crude or unadjusted estimates, while others are age-adjusted estimates. Unadjusted prevalence estimates are used to present cross-sectional data for population groups at a given point or time period. For age-adjusted rates, statistical procedures are used to remove the effect of age differences in populations that are being compared over different time periods. Unadjusted estimates and age-adjusted estimates will yield slightly different values.

Prior studies in the United States have used the 1959 or the 1983 Metropolitan Life Insurance tables of desirable weight-for-height as the reference for overweight.[3] More recently, a number of Government agencies and scientific health organizations have estimated overweight using data from a series of cross-sectional surveys called the National Health Examination Surveys (NHES) and the National Health and Nutrition Examination Surveys (NHANES). The National Center for Health Statistics (NCHS) of the Centers for Disease Control and Prevention (CDC) conducted these surveys. Each had three cycles: NHES I, II, and III spanned the period from 1960 to 1970, and NHANES I, II, and III were conducted in the 1970's, 1980's, and early 1990's. Since 1999, NHANES has become a continuous survey.........

Posted by: JoAnn      Permalink


July 5, 2006, 7:51 AM CT

Higher Death Rates With Obesity

Higher Death Rates With Obesity
While obesity has generally been viewed as a single significant health concern, a University of Pittsburgh study suggests that not all obese women share the same health risks. This multi-center study of more than 90,000 women published recently in the Journal of the American Medical Association, shows extremely obese women to be at significantly higher risk of dying than women at normal weight and links the risk of death to specific categories of obesity.

To better quantify the health risks associated with obesity, the Pitt researchers, collaborating with scientists from six other institutions, examined the rates of death and of newly diagnosed coronary heart disease over a seven year period of 90,185 women in five specific weight categories. The women, all participants of the Women's Health Initiative-Observational Study, were assigned to the weight categories based on the weight-to-height ratio known as body mass index (BMI): normal (BMI 18.5 24.9), overweight (BMI 25.0 29.9), obesity 1 (BMI 30.0 34.9), obesity 2 (BMI 35.0 ┬ĘC 39.9) and extreme obesity (BMI 40).

The study showed that white women in the obesity 1 category (approximately 60 pounds above a normal weight for a 5-foot, 5-inch tall woman) to have a 12 percent higher risk of death over the seven year follow-up period, but extremely obese women (approximately 110 pounds above a normal weight for a 5-foot, 5-inch tall woman) had an alarming 86 percent higher risk of death than their normal weight counterparts.........

Posted by: JoAnn      Permalink         Source


July 3, 2006, 9:39 AM CT

Grammar School Improves Grandma's Health

Grammar School Improves Grandma's Health
Confining activities to the rocking chair, the beach and the TV couch may be some retirees' idea of good living, but as per new research by experts at Johns Hopkins, published this month on the Journal of Urban Health's Web site, spending some time with young children in the classroom might give them a lot more time to enjoy life.

"Volunteering in a grade school may not seem immediately appealing to older Americans," said Erwin Tan, Ph.D., assistant professor of geriatrics at Johns Hopkins University and lead author of the study. "But honestly, our volunteers say it's an enriching experience, and, it turns out, it may be good for you".

In a study of 113 men and women 60 and older, Hopkins scientists investigated the subjects' physical health as it correlation to their activity levels. Fifty-nine were involved in the Experience Corps Baltimore, a volunteer program designed at Johns Hopkins' Center for Aging, which places elderly volunteers in kindergarten and grammar school classrooms to be mentors and tutors for 15 hours a week. The other 54 individuals were not enrolled in any activity-based volunteer work and served as a comparison group.

The Hopkins scientists concluded that elderly adults who failed suggested U.S. standards for physical activity when they started volunteering in public grammar schools doubled the amount of calories they burned after volunteering for just one school year. The Centers for Disease Control recommends that all Americans be physically active or exercise for half an hour a day, five days a week.........

Posted by: Janet      Permalink         Source


July 3, 2006, 9:33 AM CT

Tips To Reduce Your Cancer Risk While Grilling

Tips To Reduce Your Cancer Risk While Grilling
Summer is officially here and it's time to fire up the grill. But there's something you should know about some of your summertime favorites. All that barbecuing could be cooking up chemicals that may increase your risk of cancer. As per the American Institute for Cancer Research, these chemicals may be linked to breast, stomach, prostate, and colon cancer.

But Dana-Farber Cancer Institute nutritionist Stephanie Vangsness, RD, LDN, CNSD, says that doesn't mean you have to give up those summertime favorites like burgers, steaks, and ribs. "It's really about being careful and making wise choices."

There are two risk factors to keep in mind. The high heat of grilling reacts with proteins in red meat, poultry, and fish to create heterocyclic amines (HCAs). Studies have linked these chemicals to cancer.

Another form of cancer-causing agents, called polycyclic aromatic hydrocarbons (PAHs), are found in the smoke. They form when fat and juices from meat products drip on to the heat source. As the smoke rises, it can stick to the surface of the meat.

What can you do to lower your risk? Here are some tips to make sure your summer grilling is safe.

Prep the meat.

Choose lean cuts of meat instead of high-fat varieties, such as ribs and sausage. Trim all excess fat and remove the skin.........

Posted by: JoAnn      Permalink         Source


June 27, 2006, 11:51 PM CT

Smoking, Obesity And Erectile Dysfunction

Smoking, Obesity And Erectile Dysfunction
What's the link between smoking, obesity and erectile dysfunction? That's exactly what researchers from the Harvard University School of Public Health is trying to answer. These researchers have found that obesity and smoking are strongly associated with a greater risk of erectile dysfunction (ED). Meanwhile, regular physical activity appeared to have a significant impact on lowering the risk of ED. This is the first large-scale prospective study to examine the links between ED and smoking, obesity, alcohol and a sedentary lifestyle. The study will appear in the July 2006 issue of The Journal of Urology.

The researchers, led by Constance Bacon, a former post-doctoral fellow at HSPH, and Eric Rimm , associate professor of epidemiology and nutrition at HSPH, surveyed 22,086 healthy subjects between the ages of 40 and 75 from the Health Professionals Follow-up Study who reported good or very good erectile function and no major chronic disease before 1986. Among the participants, 17.7 percent (3,905) reported new onset of ED between 1986 and 2000. The scientists adjusted the results to take into account those with and without prostate cancer during the follow-up period, since prostate cancer therapys, such as radiation or surgery, may lead to ED.

The results showed that both smoking and obesity were associated with a higher risk of the development of ED among previously healthy men with good erectile function. The scientists also found that regular physical activity showed a strong inverse association with ED risk. "We found a 2.5-fold difference in risk of ED when we compared obese men who did little exercise with men who were not overweight and averaged 30 minutes of vigorous exercise a day. (Obesity was defined as a body mass index of more than 30 kilograms in weight divided by the square of height in meters.) For men younger than 55 there was a 4-fold difference in risk for the same comparison," said Rimm. Alcohol consumption did not increase the risk of ED. In general, men without prostate cancer showed stronger associations with these lifestyle factors than those with prostate cancer.........

Posted by: Janet      Permalink         Source


June 26, 2006, 8:03 PM CT

Pork Rivals Chicken In Terms Of Leanness

Pork Rivals Chicken In Terms Of Leanness
Pork. The Other White Meat® is one of the most recognized advertising slogans ever created, and new research announced recently solidifies this well-known description with scientific backing.

The new research, presented at the Institute of Food Technologists annual meeting, revealed a surprising fact: pork tenderloin is just as lean as the leanest type of chicken - a skinless chicken breast. The U.S. Department of Agriculture (USDA) analysis found that pork tenderloin contains only 2.98 grams of fat per 3-ounce serving1, compared to 3.03 grams of fat in a 3-ounce serving of skinless chicken breast.2 Pork tenderloin meets government guidelines for "extra lean" status.

"These new data illustrate how pork is changing to meet consumers' concerns about fat content," said Ceci Snyder, MS, RD, Assistant Vice President of Consumer Marketing for the National Pork Board. "Some of the more common cuts of pork you can find in today's meat case are now lower in fat and saturated fat because America's pork producers have improved feeding and breeding practices to deliver the leaner products that consumers demand."

In other words, pigs have gone on a diet. On average, six common cuts of pork are 16 percent leaner than 15 years ago, and saturated fat has dropped 27 percent.........

Posted by: JoAnn      Permalink         Source


June 21, 2006, 10:55 PM CT

Five Steps To Help Curb Child Obesity

Five Steps To Help Curb Child Obesity
Weight problems among children have now reached epidemic proportions. And it's no wonder. High-calorie fast foods and soft drinks are everywhere, and they are heavily promoted in a number of of the 40,000 television commercials that kids watch every year.

In Child Obesity: A Parent's Guide to a Fit, Trim, and Happy Child, nationally recognized expert on child obesity Dr. Goutham Rao uses the latest and best medical evidence available to show you how to help your child avoid or overcome this prevalent and dangerous health problem.

In the first part of his easy-to-read and informative book, Dr. Rao gives you the knowledge you need to understand the scope of the problem. He identifies the five principal culprits for obesity among children: soft drinks ("liquid candy"); fast food; television and video games; the inactivity of youngsters both at school and at play; and the changing patterns of family behavior, which have led to irregular meal times and the over-consumption of "convenience" foods.

In the second half of the book, Dr. Rao carefully explains a rational approach to helping your child achieve or maintain a healthy weight, including the science of changing people's behavior. You will also find several typical stories of overweight children, ranging from a heavy thirteen-month infant boy to a sixteen-year-old obese and self-conscious girl. With the help of their parents these children managed to achieve a healthy weight by following simple, practical advice without resorting to gimmicks or "miracle cures."........

Posted by: JoAnn      Permalink


June 19, 2006, 9:24 PM CT

Suggest your News Item To Medicineworld

Suggest your News Item To Medicineworld
As you are aware we are the leading publishers of health news on the web. We publish news items in various forms including numerous blogs and news items. We invite you to participate in our new collection.

We are looking for quality news items that would be interesting to our readers. Now you may suggest the news item from your site to be included at Medicineworld.org. Inclusion of news item at our site get instantaneous attention since the item is illustrated from various blog posts. Addition of pictures to the item adds additional attraction to your news item. Inclusion in the Medicineworld.org site brings quality links and visitors to your site.

If you have an interesting news item related to health, share it with Medicineworld.org and we share it with the world.

Suggest your News Item To Medicineworld........

Posted by: Janet      Permalink


June 19, 2006, 8:25 PM CT

Ethnic Disparities In Teen Exercise

Ethnic Disparities In Teen Exercise
A study of 17,000 U.S. adolescents finds that black and Hispanic girls are less physically active than white girls, but that this difference is attributable to the schools they attend: black, white and Hispanic girls attending the same school have no difference in physical activity. In contrast, among boys, blacks and Hispanics were more physically active than whites attending the same schools. The researchers, led by Tracy Richmond, MD, in the Division of Adolescent Medicine at Children's Hospital Boston, report and discuss their findings in the recent issue of Pediatrics.

Richmond and his colleagues carefully analyzed data from the National Longitudinal Study of Adolescent Health, a school-based study of 7th-to-12th graders.

"Obesity is a growing problem in all adolescents, but it affects racial and ethnic minorities disproportionately," Richmond says. "Since physical activity is one protective factor against obesity that we can influence, we wanted to know whether schools might help determine physical activity levels."

Their key findings are as follows:
  • On average, black and Hispanic adolescents had a higher body mass index (BMI) than white adolescents.
  • Overall, adolescent girls were less physically active than boys, reporting fewer physical activities per week.
  • ........

    Posted by: JoAnn      Permalink         Source


    June 18, 2006, 6:00 PM CT

    Is It Safe To Swim After Eating?

    Is It Safe To Swim After Eating?
    Is it necessary to avoid swimming for three hours after a meal? "It all depends on what you've eaten," says Marielle Ledoux, a professor in the Department of Nutrition at Universite de Montreal.

    "If you've had a light meal with no alcohol, there's no point in waiting that long. But if you've eaten steak or poutine, you should really wait a few hours."

    The reason is simple, as per Ledoux. "Foods that are rich in fat are harder to digest than carbohydrates. It takes more oxygen to metabolize them, so they aren't as good a source of energy for physical activity".

    Ledoux is a sports medicine specialist with a rare combination of expertise in both nutrition and physical education. She notes that muscle cramping is not caused by swimming in particular, but by any physical exertion. "However, if you have cramps in the water, it can be a catastrophe".

    Parents may keep their children out of the water after a meal because of a false belief that there's a link between digestion and fainting while swimming. Ledoux explains that the real cause of fainting in the water is the heart's reaction to the shock of the cold water on very hot skin. It is true that body temperature rises during digestion, increasing the risk of shock, but this can happen even several hours after eating. A lengthy sunbath can have the same result.........

    Posted by: Janet      Permalink         Source



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Did you know?
Exercise can't stop the aging process, but experts at Baylor College of Medicine in Houston say that for the elderly, whether it's weight training, walking, swimming or biking, 30 minutes of exercise three to five times a week is a good prescription for aging."It's never too late to start exercising," said Dr. Robert Roush, an associate professor of medicine-geriatrics at BCM. "Being physically active and exercising regularly can help prevent or delay some diseases and disabilities as people age.".

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