Diagnostic Validity and Factor Analysis of Montgomery-Asberg Depression Rating Scale in Parkinson Disease Population

Background: The Montgomery-Asberg Depression Rating Scale (MADRS) is commonly used to assess major depression in Parkinson disease (PD), but studies on its utility are few. This study examines the validity and factor structure of MADRS in population with PD. Methods: In 104 patients with idiopathic...

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Bibliographic Details
Published in:Journal of geriatric psychiatry and neurology 2016-05, Vol.29 (3), p.115-119
Main Authors: Ketharanathan, Tharini, Hanwella, Raveen, Weerasundera, Rajiv, de Silva, Varuni Asanka
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Anhedonia
Anxiety - complications
Anxiety - diagnosis
Anxiety Disorders
Depression - classification
Depression - complications
Depression - diagnosis
Depressive Disorder, Major - classification
Depressive Disorder, Major - complications
Depressive Disorder, Major - diagnosis
Diagnostic and Statistical Manual of Mental Disorders
Factor Analysis, Statistical
Female
Humans
Male
Middle Aged
Parkinson Disease - complications
Psychiatric Status Rating Scales - standards
Reproducibility of Results
Sensitivity and Specificity
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Summary:Background: The Montgomery-Asberg Depression Rating Scale (MADRS) is commonly used to assess major depression in Parkinson disease (PD), but studies on its utility are few. This study examines the validity and factor structure of MADRS in population with PD. Methods: In 104 patients with idiopathic PD, major depression was diagnosed by Diagnostic and Statistical Manual of Mental Disorders (Fourth Edition, Text Revision; DSM-IV-TR) criteria, and all patients were rated by MADRS. Results: The MADRS showed good concurrent validity with DSM-IV-TR criteria. The diagnostic cutoff was established as 16/17 (sensitivity 97.43, specificity 100%, positive predictive value 100%, and negative predictive value 98.48%). Factor analysis identified 3 factors, accounting for 76% of total variance: “sadness-anhedonia” comprising apparent sadness, reported sadness, concentration difficulties, lassitude, inability to feel, pessimistic thoughts, and suicidal ideas; “anxiety” with reduced sleep and inner tension; and “vegetative symptoms” with reduced appetite. Conclusion: The MADRS has diagnostic utility in major depression in PD. The 3-factor structure of MADRS may help to understand the different dimensions of major depression and identify distinct symptom subgroups in this population.
ISSN:0891-9887
1552-5708
DOI:10.1177/0891988715606232