A new report says only using BMI to determine if a patient has obesity leads to under-diagnosing people who are ill and over-diagnosing people who don't currently deal with the negative health consequences of obesity.

Indian doctors have revised obesity guidelines for the first time in 15 years, moving beyond the traditional BMI tool to include metrics like Waist Circumference and Waist-to-Height Ratio.

Doctors worldwide should diagnose obesity differently, relying on broader criteria and taking into account when the condition causes ill-health, according to a new framework drawn up by experts and endorsed by 76 medical organizations internationally.