title: The diagnosis and classification of depressions.
abstract: The International Calassification of Diseases and other contemporary classifications of depression are discussed, together with some general and practical classification problems. Unambiguous operational criteria need to be used for establishing diagnostic validity and comparability. There is widespread agreement on the distinction between Type A and Type B depressions and between unipolar and bipolar illness.
mesh_terms: D003863:Depression / Q000145:classification* / Q000175:diagnosis; D006801:Humans; D001523:Mental Disorders / Q000175:diagnosis*