Cognitive impairment in the remitted state of unipolar depressive disorder: a systematic review.

Summary: Depression is often thought of as a mood disorder, but does the "brain fog" lift once the sadness goes away? A comprehensive review of 11 medical studies involving nearly 1,000 participants suggests that cognitive struggles—like difficulties with memory, attention, and problem-solving—often persist even after a person is considered "cured" or in remission from unipolar depression. While the research methods varied, the trend indicates that thinking skills may remain lower compared to people who have never been depressed. This suggests doctors should look beyond just mood and treat lingering cognitive issues to help patients fully recover their quality of life.