Cognitive function in unipolar major depression: a comparison of currently depressed, previously depressed, and never depressed individuals

J Clin Exp Neuropsychol. 2012;34(7):782-90. doi: 10.1080/13803395.2012.683853. Epub 2012 May 8.

Abstract

There is a lack of consensus upon a conclusive cognitive profile characterizing unipolar major depression. Currently depressed (n = 37), recovered previously depressed (n = 81), and never depressed controls (n = 50) underwent assessment of executive functions, working memory, attention, and psychomotor speed. Currently depressed yielded significantly lower test scores than previously and never depressed subjects on a measure of working memory. Both currently depressed and previously depressed scored significantly lower than never depressed subjects on measures of processing speed. Recurrent depressed performed similarly to subjects with a single depressive episode. These findings indicate a mild and limited cognitive impairment during the course of a mild to moderate major depressive disorder among relatively young adults. Impaired processing speed should be considered in further studies as a potential irreversible marker for recurrent depression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Attention*
  • Cognition*
  • Depressive Disorder, Major / psychology*
  • Executive Function*
  • Female
  • Humans
  • Male
  • Memory, Short-Term*
  • Middle Aged
  • Neuropsychological Tests
  • Psychomotor Performance
  • Reaction Time