WHO classification of obesity
| Classification | BMI (kg/m2) | Risk of comorbidities |
|---|---|---|
| Underweight | <18.5 | Low (but risk of other clinical problems increased) |
| Normal range | 18.5 to 24.9 | Average |
| Overweight | ≥25 | |
| Pre-obese | 25.0 to 29.9 | Increased |
| Obese class 1 | 30.0 to 34.9 | Moderate |
| Obese class 2 | 35.0 to 39.9 | Severe |
| Obese class 3 | ≥40.0 | Very severe |
| Classification | BMI (kg/m2) | Risk of comorbidities |
|---|---|---|
| Underweight | <18.5 | Low (but risk of other clinical problems increased) |
| Normal range | 18.5 to 24.9 | Average |
| Overweight | ≥25 | |
| Pre-obese | 25.0 to 29.9 | Increased |
| Obese class 1 | 30.0 to 34.9 | Moderate |
| Obese class 2 | 35.0 to 39.9 | Severe |
| Obese class 3 | ≥40.0 | Very severe |
Source(s): James et al. (2001)
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