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Changes in depression scores following life-threatening illness
1MRC Clinical Pharmacology Unit, Radcliffe Infirmary, Oxford, U.K.
Journal of Psychosomatic Research
|January 1, 1990
Summary
Depression assessment in medically ill patients is challenging due to somatic symptoms. Adjusting measurement time, cut-off points, and excluding somatic items on the Montgomery and Asberg Depression Rating Scale improves accuracy for psychiatric morbidity detection.
Area of Science:
- Psychiatry
- Medical Psychology
- Clinical Research
Background:
- Medically ill patients often exhibit somatic symptoms that can confound depression assessment.
- Accurate depression measurement is crucial for effective treatment in this population.
Purpose of the Study:
- To investigate the influence of measurement time, cut-off points, and somatic item exclusion on depression incidence.
- To assess the validity of the Montgomery and Asberg Depression Rating Scale in medically ill patients.
Main Methods:
- Utilized the Montgomery and Asberg Depression Rating Scale over 21 days in 211 acutely ill patients.
- Varied the cut-off points for depression (7, 14, 21) and analyzed the impact of excluding somatic items.
Main Results:
- Depression rates varied significantly with time and cut-off points (e.g., 63% on admission with cut-off 7 vs. 16% with cut-off 21).
- Somatic symptoms accounted for over 75% of scores up to 14.
- Excluding somatic items improved the scale's consistency and reduced symptom influence.
Conclusions:
- Time of measurement, chosen cut-off points, and somatic item inclusion significantly impact psychiatric morbidity detection.
- Modifying the scale by excluding somatic items enhances its reliability in medically ill populations.