II. Epidemiology
- Prevalence: 33% US adults age 20 to 74 are obese
- Trends
- Obesity Prevalence has increased 8% since 1980
- Obesity Prevalence has increased 54% ages 6-11 years
- Patients gain 1 pound per year after age 25
III. Grading
- BMI 25 to 30: Overweight
- BMI 30 to 35: Class 1 Obesity
- BMI 35 to 40: Class 2 Obesity
- BMI >40: Class 3 Obesity (Severe Obesity)
IV. Pathophysiology: Fat expands in 2 ways
- Fat Cell Number
- Fat cell number does not decrease with weight loss
- Increases 5 fold until age 22 years
- Increase continues with nutritional excess
- Non-obese person has 25-30 billion fat cells
- Obese person has 260 billion cells
- Fat Cell Size
- Fat cell size reduces with weight loss
- Adults fill existing fat cells when they over eat
V. Evaluation
- See Obesity Evaluation
- See Obesity Measurement
- See Obesity Risk
VI. Diagnosis: Obesity
- Men: 20% over estimated Ideal Weight
- Women: 30% over estimated Ideal Weight
VII. Management
- See Obesity Management
- See Obesity Medications
- See Obesity Resources
VIII. Worksheets
- Dietician in the Box