General practice & primary care · UKMLA & AKT
Obesity
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- BMI = weight (kg) / height (m²) - standard screening tool; does not account for fat distribution
- Waist-to-height ratio (WtHR) - use alongside BMI when BMI <35 kg/m² to assess central adiposity
- Healthy: 0.4-0.49 | Increased risk: 0.5-0.59 | High risk: ≥0.6
Ethnic minority populations accumulate visceral fat at lower total body weight - use lower BMI thresholds (≥23 overweight, ≥27.5 obesity) for South Asian, Chinese, Black African, and African-Caribbean patients. Apply these same lower cut-offs when considering pharmacotherapy or surgery.
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