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Related Experiment Videos

Grading depression severity by symptom scores: is it a valid method for subclassifying depressive disorders?

T Kitamura1, Y Nakagawa, S Machizawa

  • 1National Institute of Mental Health, Ichikawa, Japan.

Comprehensive Psychiatry
|July 1, 1993
PubMed
Summary

Depression severity may be subcategorized, but using the number of diagnostic items needs caution. Further validation is recommended for this measure of depressive disorder severity.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Mental Health Research

Background:

  • Diagnostic criteria like DSM-III-R and ICD-10 suggest subcategorizing depression by severity.
  • Assessing depression severity is crucial for accurate diagnosis and treatment planning.

Purpose of the Study:

  • To validate the use of the total number of criterion B items as a measure of depression severity.
  • To assess the correlation between the number of criterion B items and the Global Assessment Scale (GAS) score.

Main Methods:

  • The study included 75 inpatients diagnosed with Research Diagnostic Criteria (RDC) major depressive disorder.
  • The total number of criterion B items (N=8) was counted as a measure of severity.
  • This measure was correlated with the GAS score for the worst week of the depressive episode.

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Main Results:

  • A weak negative correlation (r = -.232) was found between the total number of criterion B items and the GAS score.
  • This indicates that the number of diagnostic items may not fully capture the overall severity of depression as perceived by the GAS.

Conclusions:

  • While the number of diagnostic items might reflect an aspect of severity, caution is advised.
  • Further validation studies are necessary to confirm the reliability and utility of this severity measure in clinical practice.