title: Validity of the diagnosis of a single depressive episode in a case register.
abstract: OBJECTIVE
  To validate the ICD-10 diagnosis of a single depressive episode as used in daily clinical psychiatric practice and as recorded in the Danish Psychiatric Central Research Register.
  
  
  METHODS
  Patients discharged with a diagnosis of a single depressive episode were consecutively sampled from the register and diagnosed according to an interview using the Schedules for Clinical Assessment in Neuropsychiatry (SCAN).
  
  
  RESULTS
  A total of 75.4% of 399 patients with a register diagnosis of a single depressive episode also got this diagnosis according to the SCAN interview (82.8% for severe type of a single depression, 76.0% for moderate type of a single depression and 65.2% for mild type of a single depression).
  
  
  CONCLUSIONS
  The ICD-10 diagnosis of a single depressive episode can be used in daily clinical practice with sufficient precision. The validity of the diagnosis is highest for severe and moderate type of depression and decreases for mild depression.
authors.affiliation: Department of Psychiatry, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark. camilla.bock@rh.regionh.dk.
authors.forename: Camilla
authors.initials: C
authors.lastname: Bock
authors.forename: Jens Drachmann
authors.initials: JD
authors.lastname: Bukh
authors.forename: Maj
authors.initials: M
authors.lastname: Vinberg
authors.forename: Ulrik
authors.initials: U
authors.lastname: Gether
authors.forename: Lars Vedel
authors.initials: LV
authors.lastname: Kessing