title: Factor analysis of the Montgomery Asberg Depression Rating Scale in 251 bipolar II and 306 unipolar depressed outpatients.
abstract: Symptomatological differences between bipolar II (n = 251) and unipolar (n = 306) depressed outpatients, interviewed with the Structured Clinical Interview for DSM-IV, were studied by Montgomery Asberg Depression Rating Scale factor analysis. Different factors were found in bipolar II [factor 1 (apparent sadness, reported sadness), factor 2 (reduced sleep, reduced appetite), factor 3 (concentration difficulties, lassitude, inability to feel, pessimistic thoughts, and suicidal thoughts)], and in unipolar [factor 1 (apparent sadness, reported sadness, inability to feel, suicidal thoughts), factor 2 (concentration difficulties, lassitude, inability to feel, pessimistic thoughts), factor 3 (inner tension, reduced sleep)]. Different factor structure (between bipolar II and unipolar depression) supports previous findings that response to antidepressants and biology may be different in bipolar II and unipolar depression.
authors.affiliation: Department of Psychiatry, National Health Service, Forlì, Italy. f.benazzi@fo.nettuno.it
authors.forename: F
authors.initials: F
authors.lastname: Benazzi
mesh_terms: D000328:Adult; D000368:Aged; D000928:Antidepressive Agents / Q000627:therapeutic use; D001714:Bipolar Disorder / Q000188:drug therapy / Q000523:psychology*; D003430:Cross-Sectional Studies; D003866:Depressive Disorder / Q000188:drug therapy / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*
chemical_list: D000928:Antidepressive Agents