Specific within-domain cognitive impairments predict depression severity six-months after stroke

Area of Science:

• Neuroscience
• Psychiatry
• Rehabilitation Medicine

Background:

• Chronic cognitive impairments are common after stroke and linked to depression.
• The specific relationship between different cognitive subtypes and depression severity post-stroke remains unclear.

Purpose of the Study:

• To investigate the differential associations between specific within-domain cognitive impairments and depression severity six months after stroke.
• To identify which cognitive deficits are most strongly related to post-stroke depression.

Main Methods:

• 385 stroke patients (mean age 73.86 years) were assessed using the Hospital Anxiety and Depression Scale (HADS) and the Oxford Cognitive Screen (OCS).
• Multiple regression analyses examined the unique contribution of OCS domain-specific and subtask-specific cognitive impairments to depression severity, controlling for anxiety and education.
• Findings were corroborated using pooled multiply imputed data (N=430).

Main Results:

• Calculation, episodic memory, picture naming, number writing, and visuospatial attention impairments were uniquely associated with higher depression severity.
• These specific cognitive deficits showed significant relationships with depressive symptoms post-stroke.

Conclusions:

• Certain within-domain cognitive impairments have distinct relationships with post-stroke depressive symptoms.
• Targeting these specific cognitive deficits in interventions could potentially improve depression outcomes for stroke survivors.