A comparison of DSM and ICD classifications of mental disorder

Most disorders in medicine are classified using the ICD (initiated in Paris in 1900). Mental and behavioural disorders are classified using the DSM (DSM-I was published in the USA in 1952), but it was not until DSM-III in 1980 that it became a major player. Its success was largely influenced by Robert Spitzer, who welded its disparate elements, and Melvyn Shabsin, who facilitated its acceptance. Spitzer pointed out that most diagnostic conditions in psychiatry were poorly defined, showed poor reliability in test–retest situations, and were temporally unstable. The consequence was that the beliefs of the psychiatrist seemed to matter much more than the characteristics of the patient when it came to classification. Since DSM-III there has been a split between those who adhere to DSM because it is a better research classification and those who adhere to ICD because it allows more clinical discretion in making diagnoses. This article discusses the pros and cons of both systems, and the major criticisms that have been levelled against them.