Generalized Anxiety Disorder

1. See Also
   1. Anxiety Disorder
   2. Anxiety Secondary Cause
   3. Anxiety Symptoms
   4. Obsessive Compulsive Disorder
   5. Body Dysmorphic Disorder
   6. Panic Disorder
   7. Social Anxiety Disorder (Social Phobia)
   8. Acute Stress Disorder
   9. Post-Traumatic Stress Disorder
   10. Excessive Worry
   11. Anxiety Non-pharmacologic Management
   12. Anxiety Pharmacologic Management
2. Epidemiology
   1. Most common Anxiety Disorder
   2. Adult Prevalence
      1. Annual: 2 to 3% per year
      2. Lifetime: 7-8% in women, 4-5% in men
   3. Onset peaks in ages 20 to 40 years (least common over age 60 years)
   4. Women are more than twice as likely to be diagnosed with anxiety over lifetime
3. Pathophysiology
   1. Dysregulation of worry
4. Symptoms: Topics of Excessive Worry
   1. Children
      1. School performance
      2. Sports performance
      3. Catastrophic events (e.g. earthquake, nuclear war)
   2. College students
      1. Academic performance
      2. Relationships
   3. Adults
      1. Children's well-being
      2. Illness or injury
      3. Family and other relationships
      4. Occupational and financial concerns
   4. Elderly
      1. Health
      2. Social relationships
      3. Finances
5. Symptoms: Physical
   1. See Anxiety Symptoms
   2. Excessive, overwhelming and uncontrolled worry
6. Symptoms: Avoidance behaviors
   1. Avoidance of activities may be subtle
   2. Limited interpersonal relationships
   3. Procrastination
   4. Non-assertive in new situations
7. Diagnosis: Diagnostic Criteria (DSM V)
   1. Excessive anxiety and worry for at least 6 months on most days
   2. Involves two or more life circumstances (e.g. home, work)
   3. Anxiety or worry is difficult to control
   4. Associated symptoms (3 present in adult, 1 in child)
      1. Restlessness or on edge
      2. Fatigue
      3. Difficult concentration
      4. Irritable
      5. Muscle tension
      6. Sleep disturbance
   5. Impaired social or occupational functioning or distress
   6. No Anxiety Secondary Cause
      1. Not primarily to other psychiatric illness
         1. See Differential Diagnosis below
      2. Not primarily due to underlying medical condition
         1. See Anxiety Secondary Causes
      3. Not primarily due to Substance Abuse
8. Diagnosis: Scales
   1. Generalized Anxiety Disorder Scale (GAD-7)
   2. PROMIS Emotional Distress-Anxiety Short Form for adults
   3. Severity Measure for Generalized Anxiety Disorder - Adults
   4. Hamilton Anxiety Scale (HAM-A)
   5. Zung Self Rating Scale for Anxiety
   6. Beck Anxiety Scale
9. Differential Diagnosis
   1. See Anxiety Secondary Causes
   2. Major Depression
   3. Personality Disorder (Anxiety Cluster)
   4. Other Anxiety Disorder
      1. Excessive Worry due to Panic Attacks
      2. Anxiety Adjustment Disorder
      3. Social Anxiety Disorder
      4. Obsessive Compulsive Disorder
      5. Posttraumatic Stress Disorder
   5. Other psychiatric conditions
      1. Eating Disorder (anxiety)
      2. Body Dysmorphic Disorder
10. Management
    1. See Anxiety Non-pharmacologic Management
    2. See Anxiety Medications
11. Prognosis: Predictors of better outcomes
    1. Lower anxiety level
    2. Lower demoralization level
    3. Higher level of Major Depression at presentation
12. References
    1. APA (1994) DSM IV, APA, p. 432-6
    2. Derogatis (1989) Anxiety and Depressive Disorders, p.42
    3. Kroenke (2007) Ann Intern Med 146(5): 317-25 [PubMed]
    4. Locke (2015) Am Fam Physician 91(9): 617-24 [PubMed]
    5. Wittchen (2002) J Clin Psychiatry 63:24-34 [PubMed]
    6. Zal (1995) Fam Prac Recert 17(10): 17-32 [PubMed]