The Hamilton Depression Rating Scale (HDRS); changes in scores as a function of training and version used

Area of Science:

• Psychiatry
• Clinical Psychology
• Psychometric Research

Background:

• The Hamilton Depression Rating Scale (HDRS) is a widely used instrument for assessing depression severity.
• Discrepancies may arise in depression research due to the existence of multiple HDRS versions.
• Standardization is essential for reliable and valid depression assessment.

Purpose of the Study:

• To investigate score differences between two prominent versions of the Hamilton Depression Rating Scale (HDRS).
• To evaluate the impact of rater experience and training on HDRS scoring.
• To highlight the importance of specifying HDRS versions and training in depression research.

Main Methods:

• Utilized 16 videotapes for a training procedure involving over 900 scores.
• Compared the original 1960 Hamilton Depression Rating Scale (HDRS) with the 1986 version by Bech et al.
• Analyzed the influence of prior rater experience and in-training score changes.

Main Results:

• The 1986 HDRS version produced significantly lower total scores compared to the original 1960 version.
• Rater experience did not significantly impact scores.
• Scores significantly increased during the training procedure, albeit by a small, consistent margin (one point).

Conclusions:

• The specific version of the Hamilton Depression Rating Scale (HDRS) significantly influences depression assessment outcomes.
• Training procedures can lead to score changes, necessitating clear documentation.
• Researchers must meticulously specify the HDRS version and training protocols in depression studies to ensure data integrity and comparability.