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Agitated depression: a valid depression subtype?

Franco Benazzi1

  • 1E. Hecker Outpatient Psychiatry Center, Ravenna, Italy. f.benazzi@fo.nettuno.it

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|December 14, 2004
PubMed
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Agitated depression (AD) is common in depression outpatients and linked to bipolar disorder. Mixed agitated depression shows distinct features, suggesting subtyping may be clinically useful for treatment.

Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Mood Disorders

Background:

  • Agitated depression (AD), a major depressive episode with psychomotor agitation, lacks clear diagnostic classification in current systems like DSM-IV and ICD-10.
  • Existing data suggest AD may represent a distinct subtype of depression, warranting further investigation into its diagnostic validity and clinical characteristics.

Purpose of the Study:

  • To investigate the diagnostic validity and subtyping potential of agitated depression (AD) in outpatients with major depressive disorder (MDD) and bipolar II (BP-II) disorder.
  • To differentiate between mixed AD and non-mixed AD and compare their clinical features with non-AD presentations.

Main Methods:

  • Interviewed 245 BP-II and 189 MDD outpatients using structured clinical interviews (SCID-CV, HIGH-C) off psychoactive drugs.

Related Experiment Videos

  • Systematically assessed intra-MDE hypomanic symptoms to define AD (MDE with psychomotor agitation) and mixed AD (MDE with ≥4 hypomanic symptoms including agitation).

    • Main Results:

    • Agitated depression (AD) was identified in 34.7% of patients, with 70.1% of these cases being mixed AD.
    • AD was associated with earlier onset, higher rates of BP-II, female gender, atypical depression, and bipolar family history compared to non-AD.
    • Mixed AD demonstrated more pronounced differences from non-AD, including greater intra-MDE hypomanic symptoms, supporting its distinctiveness.

    Conclusions:

    • Agitated depression (AD) is a prevalent condition in depression outpatients, supporting its diagnostic utility and association with the bipolar spectrum.
    • The findings support the subtyping of mixed AD, as it exhibits distinct clinical features compared to non-mixed AD and non-AD.
    • Subtyping mixed AD may have significant implications for treatment strategies, particularly concerning the use of antidepressants, which could potentially exacerbate agitation.