CLAIMS that childhood obesity in Australia has been exaggerated serve to trivialise a real problem, Australian Medical Association (AMA) president Rosanna Capolingua says.

New research shows Australia's childhood obesity epidemic has been exaggerated and the problem is increasing only among lower-income families.

While the study sharpens focus on the problem affecting lower-income families, Australia has general problems with childhood obesity, Dr Capolingua says.

"It is trivialising to say that childhood obesity in Australia has been overplayed as a problem," she said.

"The rates are still increasing even if they are not increasing at a significant rate.

"If we are getting to a plateau then 'hooray', but we've still got a lot of work to do with the kids we do have problems with, and it's not just about obesity, it's about overweight as well.

"You only have to walk down a street in Australia to know we have a problem."

Earlier today...

Controversial new research into childhood obesity rates called into question whether the millions of dollars allocated by the Federal Government for obesity prevention programs should be targeted to the highest-risk groups, rather than focused at the general population.

The findings, based on measurements taken from thousands of Australian children in two nationally representative samples in 2000 and 2006, found that the growth in childhood obesity overall has slowed to a crawl, and the only statistically significant increases are now among boys and girls from low-income homes, The Australian reports.

Last night, Health Minister Nicola Roxon said obesity was "a significant challenge in health and a cause of several major chronic diseases - and will remain a priority for the Rudd Government".

The overall obesity rate rose only slightly, from 6 per cent in 2000 to 6.8 per cent in 2006 - an increase researchers said was not statistically significant.

Among low-income boys, obesity almost doubled from 5.4 per cent in 2000 to 9.3 per cent in 2006. The increase for wealthier children was much less, rising from 4.9 per cent to 6.8 per cent among middle-income boys and from 3.7 per cent to 4.9 per cent for the wealthiest.

Among low-income girls, the obesity rate increased from 3.9 per cent in 2000 to 6.8 per cent in 2006, whereas the rate stayed flat at 5.5 per cent for middle-income girls, and increased from 2.4 per cent to 3.9 per cent among high-income girls.

Australia's health ministers in 2003 labelled obesity "an epidemic". In this month's Budget, the Government said it would spend $62 million under its National Preventative Health Strategy to fight obesity, including nearly $13 million to fund a kitchen garden program in 190 schools nationally.

But Jenny O'Dea, associate professor of child health research at the University of Sydney, willtell a Nutrition Australia conference next month that obesity in children "has not increased overall" between 2000 and 2006.

In comments that have already drawn fire from some other obesity experts, Professor O'Dea told The Weekend Australian there was "no doubt that it (childhood obesity) has been exaggerated".

"Some kids are more at risk than others, and that's where the prevention efforts need to go," she said.