Psychometric properties of the Patient Health Questionnaire-15 (PHQ-15) for measuring the somatic symptoms of psychiatric outpatients

Psychosomatics. 2009 Nov-Dec;50(6):580-5. doi: 10.1176/appi.psy.50.6.580.


Background: About 2% to 5% of all primary-care patients have a somatization disorder, and somatic symptoms are strongly associated with comorbid depression and anxiety disorders.

Objective: The authors evaluated the validity of the 15-item Somatization module of the Patient Health Questionnaire (PHQ-15) among psychiatric outpatients.

Method: The PHQ-15 was administered to patients with somatic complaints; it was compared with the Beck Depression Inventory (BDI) and the General Health Questionnaire-12 (GHQ-12). Fifty-seven Korean subjects completed the survey.

Results: The PHQ-15 exhibited significant internal consistency, and test-retest reliability. Convergent validity with the BDI and GHQ-12 were positive.

Conclusion: These results indicate that the Korean version of the PHQ-15 is appropriate for measuring the severity of somatic symptoms in a psychiatric outpatient setting.

Publication types

  • Evaluation Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adolescent
  • Adult
  • Female
  • Health Status*
  • Humans
  • Interview, Psychological / methods
  • Korea
  • Male
  • Middle Aged
  • Outpatients / psychology*
  • Outpatients / statistics & numerical data*
  • Psychiatric Status Rating Scales / statistics & numerical data
  • Psychometrics
  • Psychophysiologic Disorders / diagnosis*
  • Psychophysiologic Disorders / psychology
  • Reproducibility of Results
  • Severity of Illness Index
  • Surveys and Questionnaires / standards*
  • Young Adult