Extended International (IOTF) Body Mass Index Cut-Offs for Thinness, Overweight and Obesity in Children
The revised international child cut-offs are available corresponding to the following body mass index (BMI) cut-offs at 18 years:
• 16 thinness grade 3
• 17 thinness grade 2
• 18.5 thinness grade 1
• 23 overweight (unofficial Asian cut-off)
• 25 overweight
• 27 obesity (unofficial Asian cut-off)
• 30 obesity
• 35 morbid obesity
The cut-offs are given for exact ages by month from 2 to 18 years.
NB if you want to apply the cut-offs as centiles or SD scores, you can use Microsoft Excel with the free add-in LMSgrowth, available here. LMSgrowth also contains the original international cut-offs.
These are available to download in Excel format here.
View abstract here