Abstract
Little research has examined the underlying symptom structure of major depressive disorder (MDD) symptoms based on DSM-IV criteria. Our aim was to analyze the symptom structure of major depression, using the Patient Health Questionnaire-9 (PHQ-9). The PHQ-9 was administered to a sample of 2615 Army National Guard soldiers from Ohio. A one-factor model of depression and three separate two-factor models previously established in the literature were evaluated using confirmatory factor analysis. Results demonstrated greater support for the two-factor models of depression than for the one-factor model. The best fitting model was the two-factor model of somatic and non-somatic symptoms supported previously by Krause et al. (2010) and Richardson and Richards (2008). Implications for understanding the components and mechanisms of MDD are discussed.
Original language | English (US) |
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Pages (from-to) | 169-173 |
Number of pages | 5 |
Journal | Psychiatry Research |
Volume | 199 |
Issue number | 3 |
DOIs | |
State | Published - Oct 30 2012 |
Keywords
- Confirmatory factor analysis
- Depression
- Military veterans
- Patient Health Questionnaire-9
ASJC Scopus subject areas
- Psychiatry and Mental health
- Biological Psychiatry