A recent article by NPR confirmed what many patients and doctors already know. The internet is leveling the playing field and allows individuals to access information easier and more quickly. Research by Pew Internet and American Life Project found:

* 61 percent of adults say they look online for health information - known as e-patients
* 20 percent of e-patients go to Internet and social-networking sites where they can talk to medical experts and other patients
* 39 percent of e-patients already use a social-networking site like Facebook

Yet as individuals embrace new technology, the New England Journal of Medicine found earlier this year that only 17 percent of doctors use electronic medical records. To say doctors are conservative and slow in adapting to new ways of communicating and accessing information would be an understatement. An article in TIME magazine proclaimed "Email Your Doctor" which graced newsstands in 1998! Email communications with doctors is still the exception rather than the rule.

Many doctors actually are very concerned about patients using the internet to research information. Stories of physicians being inundated with printouts or patients insistent that they have a certain diagnosis based on a description abound. Doctors don't always appreciate patients googling their medical information.

Why?

Because although information gathering is far easier than a decade ago, the problem is data overload. How does one filter out all of the different diagnoses with similar symptoms? How does one use judgment when theirs is based on little experience? Medical students commonly coming down with medical illnesses after studying a subject. The power of suggestion. Fever and a little neck stiffness? Meningitis. Intermittent numbness in the arm? Multiple sclerosis. Circular rash? Lyme disease.

Only through experience and actually caring for patients diagnosed by more seasoned colleagues do medical students see the textbook descriptions come. Patients diagnosed with meningitis, multiple sclerosis, and Lyme disease and their symptoms and signs are seared into their memories. Words in the textbook now have far different meanings. Reading and book learning while important only provides the foundation to build upon. It's seeing and doing that matter.

Doctors can't know everything. It can be helpful if you research information and bring in some ideas or questions you have about a particular diagnosis. I know patients are more empowered with more information, but realize there is still value in clinical expertise. Have a frank discussion with your doctor whether the information obtained by Dr. Google is accurate or relevant to your concerns. Keep an open mind. Don't be anchored by what you read. I certainly learn from my patients. My patients learn from me. It's a win-win.

While the internet can make anyone more knowledgeable, it doesn't make someone an expert. The good news is that the survey found in the end that the source people still trust the most is their doctor. So go ahead research, but find reputable sources like the Mayo Clinic or Medline Plus. Talk to your doctor and perhaps email him. Gain from both knowledge tempered with expertise.

As we all gather around for Thanksgiving, savor the time with family and friends. While I would never be mistaken for a chef, let alone a good cook, I will be making a delicious butternut squash soup which is a new Thanksgiving tradition. The recipe? Courtesy of the internet and Wolfgang Puck. How hard could it be? I finished organic chemistry.

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Dr. Davis Liu is a practicing board-certified family physician with the Permanente Medical Group in Northern California since 2000.His comments have appeared in Fortune, Smart Money, Remedy, Real and Simple, and the NY Times. He is author of the book Stay Healthy, Live Longer, Spend Wisely.

When the U.S. Preventive Services Task Force (USPSTF) updated their recommendations and were against routine mammography for women aged 40 to 49, it certainly got a lot of attention. These guidelines are far different than those advocated by the American Cancer Society (ACS) which recommends screening starting at age 40 with annual mammograms.

Who is the USPSTF?
What does their recommendations mean for women?
Why is there conflicting recommendations?

Who is the USPSTF?

The U.S. Preventive Services Task Force (USPSTF) is an independent committee of primary care and preventive physicians that periodically reviews the latest medical research and recommends tests and screening methods that have scientifically been shown to make a difference. As a result, its recommendations are the most conservative of any national organization.

The USPSTF’s recommendations are considered the “gold standard” for determining which clinical services are preventive. They review and look at various screening tests and preventive medications to determine whether there’s proof these interventions work and that the benefits they provide outweigh the potential harm. USPSTF indicates how strongly it recommends a particular method with a letter grade designation (A, B, C, D, and I). An A recommendation means that USPSTF strongly recommends that doctors provide a particular service to eligible patients. A B rating is simply a recommendation. A C means the task force recommends against routinely providing the service, but leaves the decision to the discretion of the individual doctor and patient. A D rating means the group recommends against providing for a particular intervention. An I recommendation indicates that there is not enough evidence to determine whether to recommend for or against a particular procedure.

The USPSTF recommendations tend to be the most conservative of any national organization, because they look for interventions that have proven benefits backed by research. Therefore, promising new technologies and tests that are yet unproven (and at times remain unproven or shown to be no better than existing tests) will not be recommended. As a result, the USPSTF’s guidelines may lag behind those of other organizations. But because they set such a high standard before recommending a particular treatment, insurers should cover the tests and procedures rated A and B.

From the November 2009 update on breast cancer screening update, the USPSTF recommended:

Against routine screening mammography in women aged 40 to 49 years. The decision to start regular, biennial screening mammography before the age of 50 years should be an individual one and take patient context into account, including the patient's values regarding specific benefits and harms. Grade: C recommendation.

Recommended biennial screening mammography for women aged 50 to 74 years. Grade: B recommendation.

Current evidence is insufficient to assess the additional benefits and harms of screening mammography in women 75 years or older. Grade: I Statement.

Against teaching breast self-examination (BSE). Grade: D recommendation.

Current evidence is insufficient to assess the additional benefits and harms of clinical breast examination (CBE) beyond screening mammography in women 40 years or older. Grade: I Statement.

Insufficient evidence to assess the additional benefits and harms of either digital mammography or magnetic resonance imaging (MRI) instead of film mammography as screening modalities for breast cancer. Grade: I Statement.

What does this mean for women?

First, that there is some evidence that screening between ages 40 to 49 for breast cancer among women with average risk may not be as beneficial as we previously thought. There has been evidence from other countries, like Canada, which have suggested that. However, it is highly unlikely that the American Cancer Society (ACS), being an advocacy group for cancer awareness will change their stance. They said as much with the following:

The USPSTF says that screening 1,339 women in their 50s to save one life makes screening worthwhile in that age group. Yet USPSTF also says screening 1,904 women ages 40 to 49 in order to save one life is not worthwhile. The American Cancer Society feels that in both cases, the lifesaving benefits of screening outweigh any potential harms. Surveys of women show that they are aware of these limitations, and also place high value on detecting breast cancer early.

The American Cancer Society neglects to mention the potential number of extra women harmed with the extra screening between age 40 to 49. An additional 565 women need to be screened above and beyond the 1,339 women to save one life. Within this additional group, many women will have abnormal mammograms and require breast biopsies only to discover that the results were normal. The mammogram was a false-positive.

The USPSTF found in a study in the Annals of Internal Medicine, funded by the National Cancer Institute, that screening every other year achieved over 80 percent of the benefit of screening annually while cutting the false-positive result by nearly half. While every other year screening from age 50 to 69 years resulted in about a median 16.5% (range, 15% to 23%) decrease in breast cancer deaths compared to no screening, starting mammogram at age 40 decrease the death rate further by 3 percent, but increased the costs as more false-positive cases occurred. This article helped influence their recent decision.

Realistically for women, since ACS will not change their recommendation, is that mammograms will still be a covered benefit for any woman who desires to have a mammogram as early as age 40 and can be repeated annually.

What does this mean for you? If you are worried about breast cancer, consider getting screened starting at age 40, however, the benefit of screening may not be as good as we first thought. Certainly if there is a family history of breast cancer, you should discuss with your doctor whether mammography is enough or whether a breast MRI is needed.

Why are there conflicting information?

This won't be the first time USPSTF will have different recommendations than groups like ACS or other professional medical associations. Reasonable doctors and researchers can look at the same data and have different results. It speaks to the problem of screening for cancers and the tools that we currently have. The amount of precision that we would like as patients and doctors in identifying which group of individuals truly need a screening intervention and who does not have yet to be discovered. USPSTF and ACS disagree a bit on colon cancer screening as well. For example, when it comes to colon cancer screening USPSTF gives a grade A recommendation and suggests that:

Using fecal occult blood testing, sigmoidoscopy, or colonoscopy in adults, beginning at age 50 years and continuing until age 75 years. The risks and benefits of these screening methods may vary.

Yet, ACS also recommends virtual colonoscopy or stool DNA testing as reasonable alternatives even though there is no proof they save lives.

Stay tuned. Medical science continues to evolve and recommendations continue to change. The the mean time, exercise regularly, don't smoke, eat five servings of fruits and vegetables daily, and you might extend your life by an additional 14 years!

Your most crucial and trusted relationship is between you and your doctor. Questions? Speak up and ask. Don't be scared. Be informed.

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Dr. Davis Liu is a practicing board-certified family physician with the Permanente Medical Group in Northern California since 2000.His comments have appeared in Fortune, Smart Money, Remedy, Real and Simple, and the NY Times. He is author of the book Stay Healthy, Live Longer, Spend Wisely.

It's disturbing that in the United States, two-thirds of Americans are either overweight or obese. As a doctor, it is one of the most common problems I address, even if a patient doesn't ask me to. Got a cold? Feeling stressed? Want a physical? Rolled your ankle?

Has anyone ever discussed your weight? Are you concerned about your weight? What have you tried for weight loss? What did you find successful?

In this series, I'll reviewed my discussions with patients so you understand what it will take to lose weight and keep it off.

Losing weight is hard work and frankly can be a difficult and lonely experience since the majority of Americans are overweight or obese. The problem of heaviness in this country is only becoming worse.

First some basic concepts. Overweight is defined as a body mass index or BMI greater than 25 and less then 30. Obesity is a BMI greater than 30. Morbid obesity is a BMI greater than 40. Calculate your BMI. Although BMI isn't perfect, unless you are a high performing athlete (not a weekend warrior) and have significant muscle mass, BMI is a reasonable way of determining which category you fit into.

Second, the body does not lie. Unless you have some sort of medical problem like a low functioning thyroid (hypothyroidism) or other less common hormone problem, your body does not lie. If you eat exactly the same amount as you burn, then you will not lose or gain weight. Eating less and burning more consistently will cause weight loss. Eating more and burning less will result in weight gain. Simple concept. What goes in must equal what goes out to maintain weight. Any alteration in this simple equation causes weight loss or weight gain. The body does not lie.

Third, I don't think you overeat to the degree you think I do. Patients invariably tell me that they eat very little and certainly a lot less than their friends or family. While I know individuals aren't eating a Thanksgiving dinner or eating an entire large pizza for lunch daily, weight loss requires a caloric intake less than the output. Note the previous point the body does not lie. If a person did eat a lot, he would continue to gain weight, not maintain.

Fourth, you need to understand basic math. Know this number. 3500. An addition of 3500 calories equals one pound. If your body has 3500 calories left over, then you gain a pound. Burning 3500 calories, then you lose a pound. Sounds like a lot of calories, doesn't it? But it's not. If you drank a can of regular soda daily (and yes, diet doesn't count as it has zero calories), then that is an extra 130 calories per day. In 27 days less than one month you would gain a pound (3500 / 130 = 27). In one year you would be 12 pounds heavier.

Fifth, think of calories as money and your weight as a savings account. Your savings account goes up or down depending on how much you save. Put more into the bank and withdraw less? More in your savings account. Taking out more than you put in, the amount in the savings account falls. Your bank doesn't care if you deposit $100 in pennies or in a crisp C-note. Skipping the discussion of nutritional value, your body doesn't care if the 2000 calories you are supposed to ingest comes all via salad greens or the equivalent of a box of chocolates. Money is money. Calories are calories regardless of how you get them.

Sixth, your body is built for survival and isn't stupid. Go back to the previous point. Your weight is a savings account and to keep it level what goes in equals what goes out. If all of a sudden, your income gets cut then to make ends meet you must take withdrawals from your bank account. If the income doesn't return to previous levels, then the savings account continues to get smaller.

Faced with this situation of being unable to restore deposits to previous levels, would you continue to spend as much? Of course not. To avoid bankruptcy you would make hard choices like downsizing your expenses and making adjustments. As a result you slow down the outflow of money so that eventually the amount that you spend is equal to the new decreased amount coming in.

Your body is built for survival and isn't stupid either. Faced with a budget crisis, that is a diet where calories coming in is less than what is burned, initially the body hasn't had adequate time to make adjustments. It depletes its savings resulting in weight loss. But since it is built for survival, it will make adjustments necessary to that its expenditures exactly made your diet. You no longer lose weight. Your body doesn't know whether it is on a desert island or living in the United States where food is plentiful, but all it knows is that its caloric budget was cut. It needs to keep you alive until it can find its next meal. Adjustments are made. Weight loss stops. Naturally, it will deplete fat first, then muscle. So don't worry about that being a reason not to being weight loss.

Seventh, the vast majority of patients I see weren't overweight or obese to being with. Weight gain typically occurred after high school or college, job change which was less physically demanding, after pregnancy, and as they got older. Sadly this isn't the case today where children are increasingly obese and will be the first generation of Americans not to live as long as their patients because of weight related medical problems.

Finally, the success to long term weight loss is permanent reduction in calories and increase in physical activity. It's not a diet but a lifestyle change. You can lose weight in the short-term with fewer calories, which is the reason why gastric bypass works. However, long-term weight loss requires physical activity.

Some interesting articles in USA Today regarding union positions about the H1N1 vaccine which suggest that transforming American medicine so that it is higher quality, improved access, and even more affordable will be extremely difficult if not impossible.

Some hospitals, healthcare organizations, and the state of New York attempted to have staff required to get the seasonal and H1N1 vaccines. Even though, Infectious Diseases Society of America recommended all healthcare workers get flu shots, the Service Employees International Union (SEIU) opposed this and won.

Although patients are lining up demanding flu shots, doctors and the Centers for Disease Control want those at risk, SEIU indicates that the issue is education, rather than attaining compliance by fiat. To be completely fair, too many doctors don't get vaccinated either which is equally as disturbing. In healthcare, we make too many exceptions rather than require that the right thing gets done at all times.

While I was troubled by the behavior of SEIU, I can understand while disagree with their opposition to mandatory vaccination. It seems more of a political decision rather than scientific.

Yet, later that week SEIU was again in the news. This time upset about the distribution of flu vaccine to companies that have employed in-house doctors and clinics. Specifically, the union had a problem with companies like Goldman Sachs which received vaccinations from the City of New York in a equitable system where only those at highest risk (chronic illnesses or pregnancy) were to be immunized and the original distribution was reserved for pediatricians and obstetricians who requested vaccine. Sadly only about half of the pediatricians in New York City wanted it. As a result, the city moved on to give vaccines to those doctors caring for adults, which included the physicians working at Goldman Sachs as well as the Federal Reserve Bank, Columbia hospital, and Time. From the article:

"Wall Street banks have already taken so much from us. They've taken trillions of our tax dollars. They've taken away people's homes who are struggling to pay the bills," union official John VanDeventer wrote on the Service Employees International Union website. "But they should not be allowed to take away our health and well-being."

The union has about 2 million members, including health care workers.

Um, so wait. Healthcare workers are considered a high-risk group as defined by CDC. Naturally healthcare workers should be among the first in line to get the vaccine. If you had agreed to a mandatory vaccination program for those in the union who are healthcare workers, wouldn't that mean those in your union therefore are vaccinated and kept healthy? Getting the vaccine, which is in short supply wouldn't be a take away, but a benefit!

Having mandatory vaccinations in really only a small issue in a much larger problem. How can employers and unions get together and transform American healthcare?

To be clear, I'm not opposed to unions. One of the most successful organizations ever is Southwest Airlines, which to the surprise of many who don't know, is among the most unionized airline in the country.

I'm troubled because companies like General Motors failed because unions and employers were unable to see eye to eye. As a result, it failed because it was unable to compete with foreign competitors. Unlike the auto business, there foreign national healthcare organizations wishing to take over the US marketplace.

What it does mean, however, that making healthcare better and cheaper won't happen. Result? Government takeover or increasingly more Americans uninsured, worsening healthcare quality, and increased costs.

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Davis Liu, MD
Author of Stay Healthy, Live Longer, Spend Wisely: Making Intelligent Choices in America's Healthcare System
Website: www.davisliumd.com
Blog: www.davisliumd.blogspot.com
Twitter: davisliumd

Davis Liu, MD, is a respected family physician, a healthcare educator and writer, and the author of Stay Healthy, Live Longer, Spend Wisely: Making Intelligent Choices in America's Healthcare System. He is a practicing board-certified family physician with the Permanente Medical Group in Northern California since 2000. Dr. Liu received his medical degree from the University of Connecticut School of Medicine, and graduated summa cum laude and Phi Beta Kappa from the Wharton School of Business at the University of Pennsylvania. He completed his residency training at the Glendale Adventist Family Practice Residency Program.

Until healthcare reform improves the American healthcare system, he feels individuals today need to have the vital information necessary to ensure that they are doing the right things so that they and their families Stay Healthy, Live Longer, and Spend Wisely.