Definition of obesity
Etiology
Simple: only obesity without any organic
obesity without any organic disease
Secondary: cortisolism, POCS, pancreatic
insulinoma, hypothalamic obesity, nail
hypothyroidism, hypothyroidism, hypothyroidism, hypothyroidism
Hypogonadism, etc.
Etiology and pathogenesis
Genetic
Psychoneurological factors
Endocrine factors
Lifestyle and dietary habits
China (survey of middle-aged population in 1998) There are great differences in the incidence of overweight and obesity from place to place North>South Urban>Rural Severe areas Overweight: >50% Most areas Obesity: 25 times
Increased prevalence of obesity-related diseases
Studies in Singapore, Hong Kong and parts of mainland China.
BMI >23 is associated with a significant risk of obesity-related diseases, such as type 2 diabetes and hypertension.
Significantly increased risk of obesity-related diseases such as type 2 diabetes and hypertension
At the same BMI level, Asians tend to be abdominally obese
South Asian body fat tends to be distributed centripetally
Compared to European data, at the same BMI level, the trunk
Thicker skin folds and significantly higher mean waist-to-hip ratio
Recommended for men >90cm Women >80cm
Sharp increase in the prevalence or incidence of obesity and overweight
Prevalence of urban obesity in some Pacific Island countries
Women 56-74% Men 44-57%
China 1982-1992
Overweight urban population: 9.7% → 14.9%
Overweight population in rural areas: 6.8%→8.4%
The relationship between obesity and related diseases
BMI standard, waist circumference and risk of related diseases in Asian adults
Classification BMI Risk of related diseases
Waist circumference
< 90/80 ≥ 90/80
Underweight