Associations between cognitive function, metabolic factors and depression: A prospective study in Quebec, Canada

Area of Science:

• Neuroscience
• Psychiatry
• Metabolic Health

Background:

• Metabolic risk factors, cognitive impairment, and a history of depression are established predictors of future depressive episodes.
• Understanding the interplay of these factors is crucial for identifying at-risk individuals.

Purpose of the Study:

• To investigate the combined effects of metabolic risk factors, cognitive function, and depression history on the incidence of major depressive episodes in middle-aged adults.
• To evaluate potential interactions between these health indicators.

Main Methods:

• Utilized baseline and follow-up data from a population-based study in Quebec, Canada, involving 1788 adults aged 40-69 without diabetes.
• Assessed cognitive function (processing speed, episodic memory, executive function) and metabolic risk factors at baseline.
• Evaluated depression history via clinical interview at follow-up and employed logistic regression to analyze interactions.

Main Results:

• A significant increase in depressive episode risk was observed in individuals with a comorbidity of metabolic factors, low cognitive function, and depression history.
• Abdominal obesity combined with low cognitive function and a history of depression showed the highest risk (OR=8.66).
• Individual factors like depression history (OR=3.10) also posed a notable risk.

Conclusions:

• Comorbid metabolic risk factors and low cognitive function in individuals with a history of depression are associated with a heightened risk of future depressive episodes.
• Highlights the clinical importance of screening for metabolic and cognitive issues in patients with a prior history of depression.