2009 November 28 Saturday
Diabetes To Double In United States

An aging population costs lots of money to treat for all their diseases. Rejuvenation therapies would therefore save a lot of money for disease treatments. Our aging population will double the number of people with diabetes even without an increase in prevalence at each age.

In the next 25 years, the number of Americans living with diabetes will nearly double, increasing from 23.7 million in 2009 to 44.1 million in 2034. Over the same period, spending on diabetes will almost triple, rising from $113 billion to $336 billion, even with no increase in the prevalence of obesity, researchers based at the University of Chicago report in the December issue of Diabetes Care.

$336 billion per year to manage one disease. The idea here isn't that $336 billion will be spent to cure each patient. If methods of cure existed they'd probably cost far less than a few hundred billion per year. When cures exist they are usually much cheaper than managing a disease.

The number of those with diabetes covered by Medicare will rise from 8.2 million to 14.6 million, the researchers predict. Medicare spending on diabetes will jump from $45 billion to $171 billion.

"If we don't change our diet and exercise habits or find new, more effective and less expensive ways to prevent and treat diabetes, we will find ourselves in a lot of trouble as a population," said the study's lead author Elbert Huang, MD, assistant professor of medicine at the University of Chicago.

"Without significant changes in public or private strategies," the authors wrote, "this population and cost growth are expected to add a significant strain to an overburdened health care system."

If obesity rises then the cost will be higher. But if drugs come on the market that cut the incidence of obesity then the incidence of diabetes would plummet. Drugs that reverse the metabolic changes that cause adult-onset insulin resistant diabetes might also do the trick. I also wonder whether getting high fructose corn syrup out of our diets would cut the incidence of diabetes as well.

By Randall Parker    2009 November 28 07:56 PM   Entry Permalink | Comments (1)
2005 June 29 Wednesday
Cholesterol And Obesity Risks Peak In Middle Income Countries

A group of researchers from Harvard, University of Auckland in NZ, University of Queensland in Australia, and something called the International Obesity Task Force in London have found that obesity and cholesterol levels peak in middle income countries and decline with higher incomes.

Background

Cardiovascular diseases and their nutritional risk factors—including overweight and obesity, elevated blood pressure, and cholesterol—are among the leading causes of global mortality and morbidity, and have been predicted to rise with economic development.

Methods and Findings

We examined age-standardized mean population levels of body mass index (BMI), systolic blood pressure, and total cholesterol in relation to national income, food share of household expenditure, and urbanization in a cross-country analysis. Data were from a total of over 100 countries and were obtained from systematic reviews of published literature, and from national and international health agencies.

BMI and cholesterol increased rapidly in relation to national income, then flattened, and eventually declined. BMI increased most rapidly until an income of about I$5,000 (international dollars) and peaked at about I$12,500 for females and I$17,000 for males. Cholesterol's point of inflection and peak were at higher income levels than those of BMI (about I$8,000 and I$18,000, respectively). There was an inverse relationship between BMI/cholesterol and the food share of household expenditure, and a positive relationship with proportion of population in urban areas. Mean population blood pressure was not correlated or only weakly correlated with the economic factors considered, or with cholesterol and BMI.

Conclusions

When considered together with evidence on shifts in income–risk relationships within developed countries, the results indicate that cardiovascular disease risks are expected to systematically shift to low-income and middle-income countries and, together with the persistent burden of infectious diseases, further increase global health inequalities. Preventing obesity should be a priority from early stages of economic development, accompanied by population-level and personal interventions for blood pressure and cholesterol.

I have to quibble with their comment about "persistent burden of infectious diseaes". I doubt that middle income countries labor under as much infectious disease burden as lower income countries. As incomes rise and obesity and cholesterol become problems disease burdens probably fall for a number of reasons including wider spread vaccination, better housing which reduces exposure to disease and to weather, reduced malnutrition of types that suppress immune response, and cleaner water.

In the longer run I expect the infectious disease burden to drop even in many lower income countries as vaccines get developed which are cheaper and easier to deliver (e.g. geneticaly engineered into foods), advances in nanotechnology make water purification cheap, and other advances made in the industrialized countries get delivered cheaply to the basketcase countries of the world.

I think they are on firmer ground in claiming that there are inflection points where the health consequences of rising affluence on cardiovascular disease reach a peak and then reverse. People in the most developed countries are more likely to get screened for cardiovascular risk factors and to take statin drugs to lower cholesterol and drugs to lower blood pressure. They also have more income to spend on fruits and vegetables and to purchase other foods that lower risks (e.g. fish).

An accompanying essay by Thomas E. Novotny of UCSF entitled Why We Need to Rethink the Diseases of Affluence makes an important point about environmental engineering.

As populations assume more of an urban lifestyle, they should not be limited in their choices for healthy foods, suffer from lack of safe water, or lose opportunities for physical activity. These problems can be reduced through good urban planning, better food policies, improved environmental engineering, and better attention to healthy lifestyle practices in our growing cities. Screening for hypertension, hypercholesterolemia, and nicotine addiction need to become a part of good clinical practices in low- and middle-income countries. Of course, screening for these risks should then also be accompanied by better availability of low-priced secondary prevention therapies such as generic versions of anti-hypertensives, statins, and nicotine replacement therapies.

The amount of exercise that people get in more urbanized and suburban environments could be increased if areas were set aside for public parks, streets were designed to be more pedestrian and bicycle friendly, and zoning put stores and offices within walking distances of homes.

Also, note Novotny's reference to nicotine replacement therapies. This touches on a larger subject: It is my impression that the United States has a much more anti-smoking regulatory environment than less developed countries and even than the bulk of the most industrialized countries. Some of the other Western industrialized countries are trending toward reducing smoke exposure in work places and discouraging smoking. That lowers cardiovascular risk relative to lower and middle income countries which generally have fewer limits on cigarette smoking, sales, and advertising and fewer public health warnings against smoking.

Food fortification is also probably making a difference. For example, the addition of folic acid to grain-based foods in the United States is lowering average blood homocysteine and that is reducing cardiovascular diseasa. The motivation behind the folic acid fortification was to lower spina bifida birth defects. The cardiovascular disease reduction is a bonus. But fortification is cheap and could and should be implemented more widely in middle and lower income countries. Africa would benefit especially.

In the medium run I expect the cost of cardiovascular disease reduction to fall to levels that cause cardiovascular risk reduction practices to spread to medium and lower income groups and countries. Genetic engineering of foods will improve diets. For example, genetic engineering will increase omega 3 fatty acid levels in grains and livestock while simultaneously reducing the level of fats that most increase cardiovascular risks. Another possibility is the genetic engineering of food crops to raise levels of a compound called beta sitosterol which is now used in special cholesterol lowering margarines. Also, cheaper, safer, and easier ways to control appetite and reduce nicotine cravings will be found.

In the long run I expect to see genetic engineering of liver cells to make them control blood lipid and cholesterol levels to assure optimal blood for cardiovascular health. Also, stem cell therapies and other gene therapies will allow repair of all atherosclerotic plaque damage and heart muscle damage.

By Randall Parker    2005 June 29 12:34 PM   Entry Permalink | Comments (2)
2005 March 22 Tuesday
European Obesity Rates Surpassing American Levels

People are porking out all over.

The proportion of overweight or obese men is higher in some European countries than it is in the United States, experts said yesterday in an analysis of Europeans' expanding girth.

The International Obesity Task Force estimated that Finland, Germany, Greece, Cyprus, the Czech Republic, Slovakia and Malta have exceeded the United States figure of 67% for overweight or obese males.

Some snobbish Englishmen told me years ago that Americans were lazy and had no self-restraint and that American obesity rates were a disgrace to the country. I've heard this from continental Europeans as well. I tried to explain to them that obesity is the inevitable result of tens of thousands of years of human evolutionary history where humans were calorie deficient most of the time combined with a high level of automation of manual labor, cheap food, and high living standards. Their societies were just not as far along down the road of making humans ill-adapted to their environment because they had lower living standards. They were all ill-disposed toward my argument. Well, all you snobs: Your cultures are not immune to obesity.

In the short run (5-15 years) I expect obesity to worsen in all the industrialized and industrializing countries and for human health to suffer as a result. But in the medium run we will have drugs to control appetite and prevent obesity. In the longer run we will have gene therapies that will reprogram our bodies to adapt us to the unnatural environments that we have created for ourselves. Note that by "unnatural" I'm not trying to imply these modern environments are innately bad. The problem is simply that we evolved to be adapted to other kinds of environments. Those other environments have plenty to be said against them (e.g. lots of diseases and temperature extremes that are stressful). We just need to adjust our bodies to be compatible with our technologies.

By Randall Parker    2005 March 22 01:54 PM   Entry Permalink | Comments (4)
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