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Subtyping of panic disorder by symptom profile
A C Briggs1, D D Stretch, S Brandon
1Department of Psychiatry, University of Leicester.
Summary
Patients with panic disorder can be split into two groups based on respiratory symptoms. This distinction impacts treatment choices, with imipramine for respiratory symptoms and alprazolam for non-respiratory symptoms.
Area of Science:
- Psychiatry
- Clinical Psychology
- Pharmacology
Background:
- Panic disorder is a significant mental health concern.
- Understanding panic attack subtypes is crucial for effective treatment.
- Previous research has explored various panic attack classifications.
Purpose of the Study:
- To investigate the clinical significance of respiratory symptoms in panic attacks.
- To identify distinct patient groups based on panic attack characteristics.
- To determine if these groups respond differently to panic disorder treatments.
Main Methods:
- Phase II of the Cross-National Panic Study involved 1168 patients.
- Patients' last severe panic attacks were described and analyzed.
- Statistical analysis was used to group patients and compare outcomes.
Main Results:
- Two distinct patient groups emerged: those with and without prominent respiratory symptoms.
- Groups did not differ in demographics or coexisting diagnoses.
- Significant differences were observed in baseline psychopathology and treatment response.
- Patients with respiratory symptoms experienced more spontaneous attacks and responded to imipramine.
- Patients without respiratory symptoms experienced more situational attacks and responded to alprazolam.
Conclusions:
- Distinguishing between spontaneous and situational panic attacks is clinically important.
- The presence or absence of respiratory symptoms can guide treatment selection for panic disorder.
- Imipramine and alprazolam show differential efficacy based on panic attack characteristics.