New Global Definition Cuts Childhood Obesity Rates Compared With BMI

Australian scientists applied the Lancet Commission’s clinical obesity definition, which incorporates excess fat and related health symptoms, to a dataset of more than 7.8 million people from seven countries. The new metric identified only 2.1-4.9 % of children and adolescents as clinically obese, a stark contrast to the 7-10.8 % flagged by conventional BMI standards. While early-life prevalence appears lower, clinical obesity rates rise throughout adulthood, overtaking BMI-based estimates from the mid-50s and reaching a high of 52 % among those aged 65-74.

Gender differences emerged, with men showing higher rates in early-mid adulthood and women later in life. Researchers argue the revised definition could improve clinical decision-making and resource planning for obesity-related health care.