• Neurology · Oct 2013

    Risk of Parkinson disease after depression: a nationwide population-based study.

    • Cheng-Che Shen, Shih-Jen Tsai, Chin-Lin Perng, Benjamin Ing-Tiau Kuo, and Albert C Yang.
    • From the Department of Psychiatry (C.-C.S.), Chiayi Branch, Taichung Veterans General Hospital; Department of Information Management (C.-C.S.), National Chung-Cheng University, Chiayi; Department of Psychiatry (S.-J.T., A.C.Y.), Division of Gastroenterology, Department of Medicine (C.-L.P.), and Department of Research and Medication (B.I.-T.K.), Taipei Veterans General Hospital; School of Medicine (S.-J.T., C.-L.P., B.I.-T.K., A.C.Y.), National Yang-Ming University, Taipei; and Center for Dynamical Biomarkers and Translational Medicine (A.C.Y.), National Central University, Chungli, Taiwan.
    • Neurology. 2013 Oct 22; 81 (17): 1538-44.

    ObjectiveTo evaluate the risk of Parkinson disease (PD) among patients with depression by using the Taiwan National Health Insurance Research Database (NHIRD).MethodsWe conducted a retrospective study of a matched cohort of 23,180 participants (4,634 patients with depression and 18,544 control patients) who were selected from the NHIRD. Patients were observed for a maximum of 10 years to determine the rates of new-onset PD, and Cox regression was used to identify the predictors of PD. We also examined the risk of PD after excluding patients who were diagnosed with PD within 2 or 5 years after their depression diagnosis. A logistic regression model was used to identify risk factors associated with PD onset in patients with depression.ResultsDuring the 10-year follow-up period, 66 patients with depression (1.42%) and 97 control patients (0.52%) were diagnosed with PD. After adjusting for age and sex, patients with depression were 3.24 times more likely to develop PD (95% confidence interval 2.36-4.44, p < 0.001) compared with the control patients. After excluding patients who were diagnosed with PD within 2 or 5 years after their depression diagnosis, patients with depression had a higher hazard ratio for developing PD than the control patients. The odds ratios for age (1.09) and difficult-to-treat depression (2.18) showed that each is an independent risk factor for PD in patients with depression.ConclusionThe likelihood of developing PD is greater among patients with depression than patients without depression. Depression may be an independent risk factor for PD.

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