Among more than 2,000 obese Dallas County residents surveyed in 2000-2002, 14 percent of African Americans and 11 percent of Hispanics -- but just 2 percent of whites -- believed that they did not need to lose weight, Dr. Tiffany M. Powell of the University of Texas Southwestern Medical Center in Dallas and her colleagues found.
People who misperceived their body size were happier with their health, and felt healthier, than those who did recognize their obesity; they were also more likely to think they were at low risk of developing high blood pressure or diabetes or having a heart attack during their lifetimes. In fact, two-thirds of people with body size misperception thought they were at low risk of becoming obese.
The study "points to really a lack of understanding about the effects of obesity," Powell told Reuters Health. At the same time, she added, "you walk a fine line, because you don't want people to necessarily have an unhealthy body image, but you also want people to understand that they need to lose weight."