*Study Notes on Bulimia Nervosa and Related Disorders

Associated Psychological Disorders:
  - Commonly associated with:
    - Substance abuse
    - Anxiety disorders
    - Borderline personality disorder
    - Mood disorders
Criticism of BMI (Body Mass Index):
  - Failure to Account for Muscle Mass: BMI does not differentiate between muscle and fat, potentially misclassifying individuals.
  - Bone Density: It does not consider bone density, which can lead to misleading interpretations of body composition.
  - Distribution Issues: Lacks sensitivity to how fat is distributed within the body, which is a critical factor in health risks.
  - Demographic Sensitivity: Not sensitive to racial, ethnic, or gender differences, leading to potential health misassessments.
  - Risk Factor: BMI should be viewed only as a risk factor, not a definitive measure of health.

Medical Issues Associated with Anorexia:
  - Amenorrhea (loss of menstrual cycle)
  - Dry skin
  - Brittle nails and hair
  - Sensitivity to cold temperatures
  - Lanugo (downy hair growth on limbs and cheeks)
  - Cardiovascular problems

Prevalence Rates:
  - Anorexia Nervosa: 0.3 to 1% of Canadians
  - Bulimia Nervosa: 1 to 3% of Canadians
  - Binge Eating Disorder: 2% of Canadians
  - Predominantly affects:
    - 90-95% of individuals are women who live in urban areas.
  - Onset: Typically among adolescents aged 15-19 years old.
  - Course: Eating disorders tend to be chronic conditions.

Biological Factors:
  - Genetics: Higher incidence in individuals with identical twins compared to fraternal twins, indicating a genetic component.
  - Inherited Traits: May include:
    - Non-specific traits such as emotional instability.
    - Poor impulse control, leading to higher stress sensitivity.
    - Increased tendency to eat compulsively as a coping mechanism for stress or anxiety.
Other Inherited Traits:
- Links to traits affecting BMI, purging behaviors, and general eating concerns.