How Important is BMI when assessing Obesity Status ?
The obesity epidemic is steadily gaining ground in the western world, and the UK is no exception. The proportion of adults in the UK population classified as obese (i.e. BMI >30) virtually doubled between 1993 (14.8%) and 2023 (29.8%). Of even more concern was the statistics in our children, with obesity classifications rising in 10-11 year-olds from 17.5% in 2008 to a whopping 25.5% at the peak of the pandemic in 2021, before falling back a little to 22.7% in 2023. Can we really ignore the fact that more than a quarter of our adult population is clinically obese, and perhaps even more worryingly, almost as many of our children have already succumbed to the same problem ? First, how do we define obesity ? The key parameter is body mass index (BMI), and anyone with a BMI of more than 30 is classified as obese. There is some argument as to whether using BMI alone is the best way of assessing whether someone is clinically obese (see below for some of the arguments for and ...