W2/L2: Generalised Anxiety Disorder
### Study Notes: Generalized Anxiety Disorder (GAD) – Dr. Roberto Gutierrez
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## 1. Introduction to Anxiety Disorders
- Anxiety disorders are one of the most common psychiatric disorders.
- 28% of the population report experiencing anxiety symptoms.
- Common forms include:
- Specific phobias
- Social anxiety disorder
- Panic disorder
- Agoraphobia
- Generalized anxiety disorder (GAD)
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## 2. Generalized Anxiety Disorder (GAD)
### Definition:
- Excessive, uncontrollable worry that interferes with daily life.
- Associated with distress, sleep problems, concentration issues, and restlessness.
- Symptoms must persist for 6 months or more, most days, and should not be explained by other conditions.
### Diagnostic Criteria (ICD-10):
- Six months of prominent tension, worry, and apprehension about everyday events.
- Must exhibit at least 4 symptoms, one from the following:
1. Physical Symptoms: Palpitations, sweating, trembling, dry mouth.
2. Respiratory/Cognitive Symptoms: Shortness of breath, chest pain, dizziness, depersonalization, fear of losing control, fainting, etc.
### Exclusion Criteria:
- Worries limited to specific scenarios (e.g., social situations or phobias).
- Anxiety caused by medical conditions, substance use, or other psychological disorders.
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## 3. Epidemiology and Gender Differences
### Key Findings (Ruscio et al., 2017):
- Lifetime prevalence of GAD: 3.7%.
- GAD is twice as common in females (2:1 ratio).
- More prevalent in high-income countries (5% prevalence).
- GAD has high comorbidity (81%): Up to 90% of GAD patients also suffer from another mental disorder, often preceding other conditions.
### Impact:
- Common worries include relationships, health, finances, and daily activities.
- GAD leads to significant burdens on quality of life, healthcare services, and is associated with cardiovascular issues, unemployment, and poverty.
### Gender Differences:
- Women are more likely to report anxiety, face higher biological stress reactivity, and experience childhood trauma.
- Men are encouraged to confront fears more often, potentially leading to underreporting.
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## 4. Theoretical Models of GAD
### 1. Cognitive Model of Pathological Worry (Hirsch & Mathews, 2012):
- Key Concepts:
1. Attentional Bias: Focusing more on negative stimuli, ignoring positive information.
2. Interpretation Bias: Misinterpreting neutral events as threatening.
- Cognitive Control: Worry takes up mental resources, reducing the ability to control attention and handle stressful stimuli.
### 2. Intolerance of Uncertainty (IU) Model (Dugas et al., 1998):
- Core Idea: Individuals with GAD have an increased need for certainty and feel uncomfortable with ambiguity.
- Positive Beliefs about Worry: Worry is seen as useful for preventing surprises and managing outcomes.
- Negative Problem Orientation: Lack of confidence in problem-solving, viewing problems as threats.
- Cognitive Avoidance: Worry helps avoid emotional distress by suppressing intrusive thoughts.
### 3. Avoidance Model of GAD (Borkovec et al., 2004):
- Worry: Focuses on potential future threats rather than existing dangers.
- As the threats are hypothetical, there’s no actual fight-or-flight response.
- Worry acts as a way to mentally prepare for negative events and reduces the fear response to stressful stimuli.
- Reinforces the habit of worrying when negative events don’t happen.
### 4. Meta-Cognitive Model of GAD (Wells, 1999):
- Metacognition: Thinking about worrying.
- Two Types of Worry:
1. Type 1: Worry about specific events (e.g., “What if I have a heart attack?”).
2. Type 2: Worry about worrying (e.g., “I can’t stop worrying about my heart”).
- This leads to a cycle of increased worry, where thinking about worry amplifies anxiety.
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## 5. Interventions for GAD
### NICE Guidelines:
- Treatment follows the National Institute for Mental Health and Care Excellence (NICE) guidelines.
- Collaborative Approach: Engage both individuals and their families in treatment.
- Treatment Plan (12 to 16 CBT sessions):
1. Psychoeducation: Teach patients about GAD and the therapy process.
2. Worry Awareness Training: Keep a diary to track and understand worry patterns.
3. Coping with Uncertainty: Use scenarios, homework, and challenges to help manage uncertainty.
4. Re-evaluating Beliefs about Worry: Change beliefs about the usefulness of worry.
5. Problem Orientation: Strengthen problem-solving skills.
6. Imaginal Exposure: Challenge core fears through mental exercises.
7. Relapse Prevention: Prepare for setbacks and learn how to manage them effectively.
### Key References:
- Davey, G., Lake, N., & Whittington, A. (2015). Clinical psychology (2nd ed.). Routledge.
- Gale, C., & Davidson, O. (2007). Generalised anxiety disorder. BMJ, 334(7593), 579–581.
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### Summary:
- GAD is a chronic, highly comorbid anxiety disorder that significantly affects quality of life.
- Several theoretical models (Cognitive, Intolerance of Uncertainty, Avoidance, and Meta-Cognitive) explain the mechanisms behind GAD.
- Treatment is most effective when based on Cognitive Behavioral Therapy (CBT), emphasizing psychoeducation, worry awareness, coping strategies, and relapse prevention.