1. Risk of suicide in association with major depressive disorder among patients with dementia: a population-based nested case-control study
- Author
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Jiun-Yi Wang, Yi-Ting Hsu, Chih-Yuan Lin, Chien-Hui Liu, Kun-Chia Chang, and Chih-Ching Liu
- Subjects
Dementia ,major depressive disorder ,suicide ,nested case-control study ,Psychiatry ,RC435-571 - Abstract
Objective: This study aimed to explore the association between major depressive disorder (MDD) and suicide risk in patients with dementia. Methods: A cohort of 625,218 individuals aged ≥ 40 years with dementia was identified from Taiwan’s National Health Insurance Research Database (NHIRD) between 2007 and 2018. After excluding prevalent cases in 2007, a nested case-control study enrolling 1,256 suicide cases and 5,022 matched controls was conducted. The frequencies of MDD-related outpatient or inpatient visits over a 7-year period preceding the event dates were calculated and analyzed for association using conditional logistic regression. Results: Dementia comorbid with MDD was associated with increased suicide risk (adjusted OR [AOR]: 2.67), particularly in individuals with ≤ 1.0 MDD episodes per year (AOR: 2.85). A similar association was observed only in individuals aged ≥ 65 years and males, with a pronounced risk of suicide in those experiencing ≤ 1.0 MDD episodes per year (AOR: 3.08 for individuals aged ≥ 65 years; AOR: 3.28 for males). Conversely, the risk increase was evident with > 1.0 MDD episodes per year in those aged < 65 years (AOR: 3.04) and females (AOR: 2.45). Conclusion: MDD is associated with suicide risk in patients with dementia. The strength of this association possibly varies with age and gender.
- Published
- 2025
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