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Parkinson’s Disease
Volume 2018, Article ID 3402983, 6 pages
Research Article

Patterns and Predictors of Depression Treatment among Older Adults with Parkinson’s Disease and Depression in Ambulatory Care Settings in the United States

1Department of Pharmacy Practice and Science, College of Pharmacy, The University of Arizona, Tucson, AZ, USA
2University of Southern California School of Pharmacy, Los Angeles, CA, USA
3College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
4Department of Neurology, College of Medicine, The University of Arizona, Tucson, USA

Correspondence should be addressed to Sandipan Bhattacharjee; ude.anozira.ycamrahp@eejrahcattahb

Received 4 November 2017; Accepted 17 January 2018; Published 1 March 2018

Academic Editor: Jan Aasly

Copyright © 2018 Sandipan Bhattacharjee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Little is known regarding depression treatment patterns and predictors among older adults with comorbid Parkinson's disease and depression (dPD) in the United States (US). The objective of this study was to assess the patterns and predictors of depression treatment among older adults with dPD in the US. We adopted a cross-sectional study design by pooling multiple-year data (2005–2011) from the National Ambulatory Medical Care Survey (NAMCS) and the outpatient department of the National Hospital Ambulatory Medical Care Survey (NHAMCS). The final study sample consisted of visits by older adults with dPD. Depression treatment was defined as antidepressant use with or without psychotherapy. To identify predictors of depression treatment, multivariate logistic regression analysis was conducted adjusting for predisposing, enabling, and need factors. Individuals with dPD and polypharmacy were 74% more likely to receive depression treatment (odds ratio = 1.743, 95% CI 1.376–2.209), while dPD subjects with comorbid chronic conditions were 44% less likely (odds ratio = 0.559, 95% CI 0.396–0.790) to receive depression treatment. Approximately six out of ten older adults with PD and depression received depression treatment. Treatment options for dPD are underutilized in routine clinical practice, and further research should explore how overall medical complexity presents a barrier to depression treatment.