The CDC
[1] and WHO
[2] have adopted BMI classification that includes obesity classes 1 through 3 as defined by BMI in this table. This table shows the expanded classification used by some organizations and investigators, including Classes 4 and 5
[3]. Terms that are sometimes used include:
- Class 3 obesity – severe or extreme obesity
- Class 4 obesity – super obesity
- Class 5 obesity – super super obesity