Predicting Response to Pro-Cognitive Interventions in Mood Disorders: A Systematic Review by the International...

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Major Depressive Disorder (MDD) and Bipolar Disorder (BD) are linked to cognitive deficits impacting daily functioning.
• Pro-cognitive interventions offer potential but yield inconsistent results, possibly due to baseline factors.
• This review identifies pre-treatment characteristics predicting cognitive response to interventions.

Purpose of the Study:

• To systematically review predictors of cognitive improvement in Major Depressive Disorder and Bipolar Disorder.
• To synthesize evidence on baseline factors influencing response to pro-cognitive interventions.
• To provide methodological recommendations for future research.

Main Methods:

• Systematic search of PubMed/MEDLINE, EMBASE, PsycINFO, and Cochrane Library.
• Included randomized controlled trials (RCTs) analyzing predictors of cognitive response.
• Qualitative synthesis of findings from 40 studies involving 3864 participants.

Main Results:

• Poorer baseline cognitive performance was the most consistent predictor of greater cognitive improvement.
• Baseline depression severity, age, education, sex, IQ, diagnosis, and medication status were not significant predictors.
• High risk of bias (77%) was noted, with significant heterogeneity across studies.

Conclusions:

• Poorer baseline cognition is the most reliable predictor of cognitive improvement in mood disorders.
• More rigorous, well-powered studies are required to identify robust predictors.
• Findings aim to guide personalized pro-cognitive treatment strategies.