Researcher casts light on ‘obesity paradox’ in heart patients.

Based on the results, Oreopoulos found that 41 per cent of her study group had been wrongly classified by BMI. Some patients who had high body weight but lower body fat were mistakenly considered obese, and conversely, patients of low weight and high body fat were often labelled as normal.

“What it showed is BMI doesn’t really mean much. It’s not a good measure of risk,” she said.