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Published on: August 2, 2021
A three-factor analytic model of the MADRS in geriatric depression
R D Parker1, Elizabeth P Flint, Hayden B Bosworth
1Department of Psychiatry, University of Maryland Medical Center, Baltimore, USA.
Objective:
Major depression is a heterogeneous disorder, perhaps comprising several clinical subtypes or subgroups of symptoms. This study examined whether items on the Montgomery-Asberg Depression Rating Scale (MADRS) form distinct symptom subgroups among geriatric depressive patients that might form the basis of new outcome measures for tracking treatment effects.
Method:
The study examined a sample of 225 adults age 59 and older diagnosed with major depression. Factor analysis with oblique rotation was used to analyze baseline MADRS item scores.
Results:
Three distinct interpretable factors were obtained; all ten items loaded <0.60 on a domain. The first factor, dysphoric apathy/retardation, comprised five items: apparent sadness, reported sadness, lassitude, reduced concentration, and inability to feel. Psychic anxiety, the second factor, included three items: inner tension, pessimistic thoughts, and suicidal thoughts. The third factor, vegetative symptoms, resulted from items involving sleep and appetite.
Conclusions:
The study produced three interpretable MADRS factors reflecting geriatric depression dimensions that may be useable to monitor focused treatment outcomes.
Insights
This study identified three distinct symptom subgroups in geriatric depression using the Montgomery-Asberg Depression Rating Scale (MADRS). These factors—dysphoric apathy/retardation, psychic anxiety, and vegetative symptoms—may help track treatment effectiveness.
Area of Science:
- Geriatric Psychiatry
- Clinical Psychology
- Psychometric Analysis
Background:
- Major depression is a complex disorder with potential subtypes.
- Geriatric depression presents unique challenges in diagnosis and treatment.
- The Montgomery-Asberg Depression Rating Scale (MADRS) is a common assessment tool.
Purpose of the Study:
- To investigate if MADRS items form distinct symptom subgroups in older adults with major depression.
- To explore the potential of these subgroups as measures for tracking treatment effects.
Main Methods:
- Factor analysis with oblique rotation was applied to MADRS item scores.
- A sample of 225 adults aged 59 and older diagnosed with major depression was analyzed.
Main Results:
- Three interpretable factors emerged from the MADRS items.
- Factor 1: Dysphoric apathy/retardation (sadness, lassitude, concentration, anhedonia).
- Factor 2: Psychic anxiety (tension, pessimism, suicidal ideation).
- Factor 3: Vegetative symptoms (sleep, appetite).
Conclusions:
- The study identified three key dimensions of geriatric depression based on MADRS items.
- These factors may serve as valuable outcome measures for targeted geriatric depression treatments.
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