Persistent Depressive Disorder Persistent Depressive Disorder Comorbidities & Differential Diagnosis 1 — Questions and Answers
Question 1: Which anxiety disorder most commonly co-occurs with Persistent Depressive Disorder?
- Specific Phobia
- Generalized Anxiety Disorder (GAD) (Correct answer)
- Agoraphobia without Panic
- Selective Mutism
Correct answer: Generalized Anxiety Disorder (GAD)
Generalized Anxiety Disorder is among the most common comorbidities in PDD, with the two disorders sharing overlapping symptom profiles.
Question 2: When a patient with PDD also meets criteria for Generalized Anxiety Disorder, what treatment adjustment is commonly recommended?
- Treat only the GAD and the PDD will resolve
- Address both conditions simultaneously, often with SSRIs that treat both (Correct answer)
- Use benzodiazepines as first-line for both
- Diagnose only the more severe condition
Correct answer: Address both conditions simultaneously, often with SSRIs that treat both
SSRIs have evidence for both PDD and GAD, and treating both concurrently is recommended rather than addressing only one condition.
Question 3: Persistent Depressive Disorder has the highest differentiation challenge with which personality disorder?
- Narcissistic Personality Disorder
- Avoidant Personality Disorder
- Borderline Personality Disorder (Correct answer)
- Antisocial Personality Disorder
Correct answer: Borderline Personality Disorder
Borderline Personality Disorder often features chronic dysphoria, emptiness, and mood instability that overlap significantly with PDD symptoms.
Question 4: In a patient with both PDD and Alcohol Use Disorder, which consideration is most clinically important?
- Alcohol use always causes PDD and must be treated first
- Both conditions must be assessed and treated as they perpetuate each other (Correct answer)
- PDD should be ignored until sobriety is achieved
- Prescribe an MAOI immediately due to alcohol sedation risk
Correct answer: Both conditions must be assessed and treated as they perpetuate each other
PDD and Alcohol Use Disorder are bidirectional; alcohol worsens depression and PDD increases drinking, requiring integrated dual-diagnosis treatment.
Question 5: Which feature most helps differentiate Persistent Depressive Disorder from Cyclothymic Disorder?
- Duration of the mood disturbance
- The absence of hypomanic periods in PDD (Correct answer)
- The presence of psychotic features
- Age of onset before 18
Correct answer: The absence of hypomanic periods in PDD
Cyclothymic Disorder involves alternating periods of subsyndromal depression AND hypomania, whereas PDD does not include hypomanic periods.
Question 6: A patient with chronic low mood since childhood also exhibits persistent negative self-image and sensitivity to criticism. The clinician should assess for comorbid:
- Oppositional Defiant Disorder
- Depressive Personality Disorder traits (Correct answer)
- Panic Disorder
- Obsessive-Compulsive Disorder
Correct answer: Depressive Personality Disorder traits
Chronic low self-esteem, negativism, and rejection sensitivity are features that may indicate comorbid depressive personality traits alongside PDD.
Persistent Depressive Disorder Persistent Depressive Disorder Comorbidities & Differential Diagnosis 1
Which anxiety disorder most commonly co-occurs with Persistent Depressive Disorder?