The simply test of Body Mass Index or Quetelet index was presented by Belgian mathematician Adolphe Quetelet in 1832. Note: it does not take into modern research and human individuality.
| Result | Diagnostic | 
| <18.5 | underweight | 
| 18.5 - 24.9 | normal weight | 
| 25 - 29.9 | I degree (overweight) | 
| 30 - 34.9 | indicates for obesity (IIа degree) | 
| 35 - 39.9 | severe obesity (IIb) | 
| >40 | heavy, or morbid, obesity (III degree) | 
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