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Updated: Mar 29, 2026

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
Published on: April 26, 2024
[Depression: A predictor of dementia].
Josep Deví Bastida1, Núria Puig Pomés2, Susanna Jofre Font3
1Departamento de Psicología Clínica y de la Salud, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, España; Departament de Benestar i Familia-SISPAP/Grup Mutuam, Residencia y Centro de Día Sant Cugat, Sant Cugat del Vallés, Barcelona, España.
Depression significantly increases the risk of developing dementia, including Alzheimer's disease. Addressing depression may be a key factor in dementia prevention strategies.
Area of Science:
- Neuroscience
- Psychiatry
- Public Health
Background:
- Alzheimer's disease (AD) is a prevalent form of dementia, with 10-25% of cases potentially preventable by managing risk factors.
- Previous research suggests a link between depression and Alzheimer's, but a causal relationship remains unclear in scientific literature.
Purpose of the Study:
- To systematically review and analyze existing scientific evidence on the hypothesis that depression elevates the risk of dementia development.
Main Methods:
- A systematic review and meta-analysis were conducted on studies published between 1990 and 2014.
- Ten high-quality studies meeting specific criteria for sample characteristics, data collection, and analysis were included.
Main Results:
- The reviewed studies indicated a heightened risk of dementia in individuals with a history of depression.
- Odds ratios ranged from 1.72 to 3.59, and hazard ratios ranged from 1.72 to 5.44, signifying a substantial increase in risk.
Conclusions:
- Depression is a significant risk factor for developing dementia.
- The findings support the hypothesis that depression contributes to the development of dementia, underscoring the importance of mental health in cognitive decline prevention.
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