Overview
- The Nature analysis tested a Lancet Commission framework and used electronic health records for 844,108 adults to compare a multi‑measure definition against BMI-only rules.
- Researchers reported that people labeled as having “clinical obesity” faced about a 69% higher risk of death than those without obesity or organ dysfunction.
- The new criteria modestly raised measured obesity prevalence by roughly 3.3% to 7.4% and corrected both underdiagnosis and overdiagnosis that BMI alone produced.
- The study found that 77%–91% of people classified as “preclinical” did not progress to clinical obesity within 10 years, suggesting many of those cases may need prevention rather than immediate medical treatment.
- Experts say adopting the definition will require consensus on which organ and function measures count, clinician training and new scoring tools, and could change who qualifies for obesity drugs under current regulatory and practice rules.