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The structure of lifetime panic-agoraphobic spectrum
1Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA. ruccip@upmc.edu
Journal of Psychiatric Research
|May 24, 2008
Summary
Researchers analyzed the factor structure of the panic-agoraphobic spectrum (PAS) in 630 panic disorder patients. This analysis identified 10 distinct symptom profiles, potentially aiding personalized panic disorder treatments.
Area of Science:
- Psychiatry
- Clinical Psychology
- Psychometrics
Background:
- Panic disorder (PD) presents heterogeneously, leading to subtype descriptions based on symptom constellations.
- The panic-agoraphobic spectrum (PAS) instrument was developed for assessing lifetime panic-agoraphobic symptoms but lacked empirical structural validation.
- Previous research demonstrated the PAS's psychometric soundness and predictive utility for treatment response in mood disorder patients.
Purpose of the Study:
- To empirically analyze the factor structure of the panic-agoraphobic spectrum (PAS) questionnaire.
- To investigate the underlying dimensional structure of panic and agoraphobic symptoms in a large cohort of panic disorder patients.
- To explore the clinical relevance of identified symptom profiles for panic disorder.
Main Methods:
- Exploratory factor analysis (EFA) was employed on a dataset of 630 panic disorder patients.
- A tetrachoric correlation matrix and oblique rotation were utilized for the EFA.
- The analysis aimed to identify latent factors within the PAS questionnaire.
Main Results:
- Ten factors were extracted, explaining 66.3% of the total variance in the PAS questionnaire.
- The identified factors include panic symptoms, agoraphobia, claustrophobia, separation anxiety, fear of losing control, drug sensitivity, medical reassurance seeking, rescue objects, loss sensitivity, and family reassurance seeking.
- The first two factors align with DSM-IV criteria for panic disorder and agoraphobia, while other factors represent novel symptom dimensions.
Conclusions:
- The empirical factor structure of the PAS reveals ten distinct symptom profiles beyond core panic and agoraphobia.
- These identified symptom profiles may hold clinical significance for tailoring pharmacotherapy and psychotherapy for panic disorder.
- Future research can utilize these factors to define homogeneous patient subgroups for neurobiological studies and to advance understanding of panic disorder pathophysiology.
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