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Pathophysiology of obesity.

M E Lean1

  • 1Department of Human Nutrition, University of Glasgow, Glasgow Royal Infirmary, UK. mej.lean@clinmed.gla.ac.uk

The Proceedings of the Nutrition Society
|September 21, 2000
PubMed
Summary

Obesity, a growing global health issue, is defined by excess fat accumulation and leads to numerous health problems. Early identification and prevention, especially in youth, are crucial for long-term well-being.

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Area of Science:

  • Public Health
  • Endocrinology
  • Cardiology

Background:

  • Rising global obesity rates necessitate re-evaluation of diagnostic criteria and healthcare burden.
  • Obesity (ICD code E.66) is characterized by excess fat accumulation, leading to multi-organ pathology, especially with intra-abdominal fat.
  • Waist circumference is a key field method for identifying obesity and associated medical risks.

Purpose of the Study:

  • To review the definition, diagnostic criteria, and health consequences of obesity.
  • To highlight the role of waist circumference in risk assessment and health promotion.
  • To emphasize the importance of early identification and prevention of obesity.

Main Methods:

  • Review of epidemiological data and diagnostic criteria for obesity (BMI > 30 kg/m2).
  • Assessment of waist circumference thresholds for increased health risks (women > 80 cm, men > 94 cm).
  • Analysis of symptom development and associated metabolic and cardiovascular diseases with increasing BMI.

Main Results:

  • Obesity presents with diverse symptoms (e.g., fatigue, breathlessness, arthritis) often masked by other conditions.
  • Metabolic diseases (diabetes, hypertension, hyperlipidaemia) and increased risk of cardiovascular events and cancers are linked to obesity.
  • Childhood obesity (BMI > 25 kg/m2 before age 20) is a strong predictor of adult obesity and ill health.

Conclusions:

  • Obesity poses a significant and multifaceted threat to public health, impacting multiple organ systems.
  • Waist circumference serves as a practical tool for early risk detection and health promotion.
  • Effective public health strategies must focus on preventing obesity, particularly in adolescents, to mitigate long-term health consequences.

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