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Aim: To assess how comorbid mood disorders were associated with health service utilization of individuals with Alzheimer's disease or other dementias in a Canadian household population. Methods: The study utilized a population-based secondary data analysis approach, using data from the Canadian Community Health Survey (CCHS) 2011-2012 annual component. Results: Mood disorders were found to be more prevalent among persons with Alzheimer's disease or other dementias compared to those without (26.7% vs 7.7%). Individuals with Alzheimer's disease or other dementias and a comorbid mood disorder were more likely to use mental health services (Adj OR: 6.58, P=0.000). Conclusion: The increased usage of health services in persons with Alzheimer's disease or other dementias and a comorbid mood disorder exhibit the importance of understanding the needs of these individuals to help shift public policy. This will aid researchers in developing and implementing improved services. [ABSTRACT FROM AUTHOR]