title: Psychiatric morbidity in patients referred to an insomnia clinic.
abstract: BACKGROUND
  Insomnia is a common complaint associated with psychiatric disorders. Detection and diagnosis of insomnia can be a challenge at the primary care level. Patients often present with various kinds of psychological symptoms. Therefore, a high index of suspicion and careful assessments are crucial in eliciting signs and symptoms and making an accurate diagnosis of primary insomnia or a psychiatric disorder.
  
  
  METHODS
  This study was undertaken at the end of 2005, and is a retrospective review of all patients referred to the Insomnia Clinic and seen by the principal author in a three-year period between 2002 and 2005. Relevant data was collected from the medical records of patients who attended the clinic during this period.
  
  
  RESULTS
  In this study of 141 patients seen at an Insomnia Clinic, 47.5 percent had primary insomnia, while 52.5 percent had a primary diagnosis of a psychiatric disorder. 41.1 percent of those diagnosed with a primary psychiatric disorder had comorbid psychiatric disorders and 4.3 percent had substance abuse problems.
  
  
  CONCLUSIONS
  The various psychiatric disorders present in this group of patients highlight the need for careful assessment and recognition of these associations.
authors.affiliation: Institute of Mental Health and Woodbridge Hospital, 10 Buangkok View, Singapore 539747. rathi_mahendran@imh.com.sg
authors.forename: R
authors.initials: R
authors.lastname: Mahendran
authors.forename: M
authors.initials: M
authors.lastname: Subramaniam
authors.forename: Y H
authors.initials: YH
authors.lastname: Chan
mesh_terms: D000328:Adult; D016009:Chi-Square Distribution; D015897:Comorbidity; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D012189:Retrospective Studies; D007319:Sleep Initiation and Maintenance Disorders / Q000523:psychology*; D019966:Substance-Related Disorders / Q000453:epidemiology