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World Health Organization classification of obesity [20]
| Body mass index (kg.m2) | Classification |
|---|---|
| < 18.5 | Underweight |
| 18.5 – 24.9 | Normal |
| 25.0 – 29.9 | Overweight |
| 30.0 – 34.9 | Obese Class 1 |
| 35.0 – 39.9 | Obesity Class 2 |
| > 40.0 | Obese Class 3 (previously ‘morbid obesity’) |
