• Pain Med · Aug 2011

    The prevalence and type of Axis-I and Axis-II mental disorders in subjects with non-specific chronic back pain: results from a population-based study.

    • Andreas Gerhardt, Mechthild Hartmann, Bärbel Schuller-Roma, Klaus Blumenstiel, Christiane Bieber, Wolfgang Eich, and Sabine Steffen.
    • Department of General Internal Medicine and Psychosomatics, University Hospital, Ruprecht Karls University, Heidelberg, Germany. andreas.gerhardt@med.uni-heidelberg.de
    • Pain Med. 2011 Aug 1;12(8):1231-40.

    ObjectiveTo investigate the prevalence and the type of mental comorbidity in a population-based sample of subjects with non-specific chronic back pain.DesignRepresentative population-based survey.SettingThe city of Heidelberg (in southwestern Germany) and 10 adjacent communities.PatientsFrom a random sample of individuals (N = 2,000), 1,091 subjects completed a questionnaire including a pain assessment. Of those, 188 subjects (17%) fulfilled the criteria for chronic back pain (≥45 days of back pain in the last 3 months) and were subsequently invited to undergo a detailed clinical examination; 131 subjects (70%) agreed to participate. The Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders IV (DSM-IV) (SCID-I + II) was used to assess current (defined as the previous 4 weeks) mental comorbidity and was completed in 110 subjects (84%) with non-specific chronic back pain.Intervention  N/A.Outcome Measures  DSM-IV mental comorbidity diagnoses.ResultsThe overall prevalence of mental comorbidity of Axis-I and -II disorders were 35.5% and 15.5%, respectively. Of Axis-I disorders, anxiety disorders (20.9%) and affective disorders (12.7%) were the most frequent. Of Axis-II disorders, 9.1% of diagnoses was of the Cluster C category (anxious/inhibited). Compared with the general population, the total rate of Axis-I comorbidity was significantly higher, while the total rate for Axis-II personality disorders was only slightly different.ConclusionsThe consistent diagnoses of anxiety, fear, and avoidance in these subjects indicate that also primary care health professionals should consider anxiety disorders in patients with chronic pain, in addition to the affective disorders that are most frequently self-reported in pain patients.Wiley Periodicals, Inc.

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