Longitudinal relationships between depressive symptoms and cognitive function after stroke: A cross-lagged panel...

Area of Science:

• Neurology
• Psychiatry
• Rehabilitation Medicine

Background:

• Stroke is a primary cause of death and disability globally.
• Post-stroke depressive symptoms and cognitive impairment are common, yet their relationship is not fully understood.
• Understanding this relationship is crucial for improving stroke patient outcomes.

Purpose of the Study:

• To investigate the temporal and directional relationship between depressive symptoms and cognitive impairment after ischemic stroke.
• To elucidate the causal link between these two common post-stroke complications.
• To inform clinical interventions for better stroke prognosis.

Main Methods:

• A multicenter prospective cohort study involving 610 ischemic stroke patients.
• Assessment of depressive symptoms (Hamilton Rating Scale for Depression) and cognitive function (Montreal Cognitive Assessment) at baseline and 12-month follow-up.
• Cross-lagged panel analysis to determine the causal relationship, adjusting for covariates.

Main Results:

• A significant bidirectional relationship was found between depressive symptoms and cognitive function over time.
• Early depressive symptoms predicted later cognitive impairment.
• Higher baseline cognitive function predicted fewer depressive symptoms at follow-up.

Conclusions:

• A reciprocal causal relationship exists between depressive symptoms and cognitive function post-ischemic stroke.
• Interventions targeting either depression or cognitive function may have beneficial effects on both domains.
• This finding highlights the importance of integrated care for stroke survivors.