Hamilton Anxiety Rating Scale

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Reference: Hamilton M.The assessment of anxiety states by rating. Br J Med Psychol 1959;32:50–55.

Rating Clinician-ratedAdministration time 10–15 minutesMain purpose To assess the severity of symptoms of anxietyPopulation Adults, adolescents and children

CommentaryThe HAM-A was one of the first rating scales developedto measure the severity of anxiety symptoms, and is stillwidely used today in both clinical and research settings.The scale consists of 14 items, each defined by a series ofsymptoms, and measures both psychic anxiety (mentalagitation and psychological distress) and somatic anxiety(physical complaints related to anxiety). Although theHAM-A remains widely used as an outcome measure inclinical trials, it has been criticized for its sometimes poor ability to discriminate between anxiolytic and antidepressant effects, and somatic anxiety versus somatic side effects. The HAM-A does not provide any standardizedprobe questions. Despite this, the reported levels of inter-rater reliability for the scale appear to be acceptable.

ScoringEach item is scored on a scale of 0 (not present) to 4(severe), with a total score range of 0–56, where <17 indi-cates mild severity, 18–24 mild to moderate severity and25–30 moderate to severe.

VERSION HISTORY

  • Version Ad posted on 2012-03-07
    Several fixes and updates
  • Version Ad posted on 2012-03-07

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