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Depression in Parkinson's disease

P Hantz1, G Caradoc-Davies, T Caradoc-Davies

  • 1Department of Rehabilitation Medicine, Faculty of Medicine, University of Otago, Dunedin, New Zealand.

The American Journal of Psychiatry
|July 1, 1994
PubMed
Summary

Major depression prevalence in Parkinson's disease patients is similar to that of physically disabled individuals. This study found no significant difference in major depression rates between the two groups.

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Area of Science:

  • Neurology
  • Psychiatry
  • Epidemiology

Background:

  • Parkinson's disease (PD) is a neurodegenerative disorder affecting motor function.
  • Depression is a common comorbidity in neurological conditions, but its prevalence in PD requires further investigation.
  • Understanding depression rates in PD is crucial for comprehensive patient care and management.

Purpose of the Study:

  • To determine the prevalence of major depression (using DSM-III-R criteria) in patients diagnosed with Parkinson's disease.
  • To compare the rate of major depression in Parkinson's disease patients with that of a matched group of physically disabled individuals without neurological conditions.

Main Methods:

  • A cohort of 73 Parkinson's disease patients in Dunedin, New Zealand, completed the 30-item General Health Questionnaire and physical disability measures.

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  • Individuals scoring above 5 on the General Health Questionnaire underwent a Structured Clinical Interview for DSM-III-R--Non-Patient Version.
  • Each Parkinson's disease patient was matched with a comparison subject based on age, sex, and level of physical disability.

    • Main Results:

    • Among Parkinson's disease patients not judged to be demented, 34.2% scored above 5 on the General Health Questionnaire.
    • Only 2.7% of Parkinson's disease patients met the criteria for major depression.
    • No statistically significant difference in the prevalence of major depression was observed between Parkinson's disease patients and the matched comparison group.

    Conclusions:

    • The prevalence of major depression among individuals with Parkinson's disease may not be higher than in age- and sex-matched physically disabled individuals.
    • These findings suggest that physical disability, rather than Parkinson's disease itself, might be a significant factor associated with depressive symptoms in this population.