title: Factor structure of manic symptoms.
abstract: OBJECTIVE
  The purpose of the present study was to identify the factor structure of manic symptoms as assessed by the Scale for Manic States (SMS).
  
  
  METHODS
  The pattern of symptoms in a group of 225 adults with an ICD-10-DCR diagnosis of manic episode was studied. A factor analysis was conducted of the broad range of psychiatric symptoms covered by SMS. A principal component analysis followed by oblimin rotation was performed.
  
  
  RESULTS
  Six eigenvalues were greater than unity and parallel analysis indicated four factors. After observing the scree plot a five-factor solution seemed appropriate. Nevertheless, a six-factor solution was chosen that described the data appropriately and was clinically relevant. The six factors (psychosis, irritability aggression, dysphoria, accelerated thought stream, hedonia, and hyperactivity) captured 59.29% of the total variance.
  
  
  CONCLUSIONS
  A six-factor solution explains the clinical dimensions of mania in the present sample and dysphoria appeared as a separate factor.
authors.affiliation: Central Institute of Psychiatry, Kanke, Ranchi, India.
authors.forename: Subhash Chandra
authors.initials: SC
authors.lastname: Gupta
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Sinha
authors.forename: Samir Kumar
authors.initials: SK
authors.lastname: Praharaj
authors.forename: Sachin
authors.initials: S
authors.lastname: Gandotra
mesh_terms: D000328:Adult; D001714:Bipolar Disorder / Q000175:diagnosis*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D025341:Principal Component Analysis; D011569:Psychiatric Status Rating Scales; D012720:Severity of Illness Index