May 2, 2005 -- Obesity is on the rise across America, and earning a lot of money doesn't necessarily protect against it.
Previously, obesity was associated more with poverty than wealth, say University of Iowa researchers including Nidhi Maheshwari, MBBS, a graduate research assistant in epidemiology.
But during the past 30 years, obesity has grown at all income levels -- especially among the richest Americans, say the researchers, who reported their findings in Washington at the American Heart Association's 45th Annual Conference on Cardiovascular Disease Epidemiology and Prevention.
"There has been a perception that poor people are more likely to be fat," says Maheshwari, in a news release. "However, obesity is growing at a much faster rate in those with the highest incomes."
Thick Wallet, Thick Waistline?
Obesity is still most common among those with the lowest incomes -- but not by much.
People earning the most money ($60,000 per year or more) had the biggest growth in obesity from the early 1970s to the turn of the century, say Maheshwari and colleagues.
"The fact is that obesity is increasing in all races, all income categories, and at a faster rate with people in higher incomes," says the University of Iowa's Jennifer Robinson, MD, MPH, in a news release.
"Obesity prevalence is now similar across all income categories, with obesity prevalence in the highest income group rapidly approaching that of the lowest income group," says Robinson, an associate professor of epidemiology who also worked on the study.
National Income-Obesity Statistics
Here are the income-obesity statistics for 1971-1974:
- Less than $25,000: 22.5% obese
- $25,000-$40,000: 16.1% obese
- $40,000-$60,000: 14.5% obese
- More than $60,000: 9.7% obese
Here are the results for 2001-2002:
- Less than $25,000: 32.5% obese
- $25,000-$40,000: 31.3% obese
- $40,000-$60,000: 30.3% obese
- More than $60,000: 26.8% obese
Here's how much obesity increased in each category:
- Less than $25,000: increase of 144%
- $25,000-$40,000: increase of 194%
- $40,000-$60,000: increase of 209%
- More than $60,000: increase of 276%
Numbers are based on national surveys of adults who were at least 20 years old. Obesity was defined as body mass index (BMI) of 30 or higher. Income was adjusted to year 2000 U.S. dollars.
The statistics don't include people who are overweight but not obese (BMI of 25-29.9).
Pounds, Dollars, and Weight Loss
Rich or poor, obesity is widely considered a health risk. It's been shown to burden just about every part of the body.
The CDC says that being overweight or obese increases the risk of many diseases and health conditions including:
- High blood pressure
- High blood cholesterol or high levels of triglycerides, another blood fat associated with both heart disease and diabetes
- Type 2 diabetes
- Coronary heart disease
- Gallbladder disease
- Sleep apnea and respiratory problems
- Some cancers (endometrial, breast, and colon)
The federal government has set a goal of reducing obesity to less than 15% of the adult population by 2010. The latest data from the National Center for Health Statistics show that 30% of U.S. adults are obese and 16% of children and teens are considered overweight, which increases their risk for obesity.