ICD-10 (WHO, 1992) and DSM-IV-TR (APA, 1994, 2000) are the two internationally established diagnostic manuals for mental disorders which have now become broadly accepted and established. While the similarities between ICD-10 and DSM-IV are stronger than those between each classification and its respective predecessor, there are still sometimes significant differences; the correspondence between ICD-10 and DSM-IV varies from 33% (criteria for disorders caused by abuse of psychotropic substances) to 87% (for dysthymia). These figures demonstrate how necessary a cross-walk is that allows users to quickly and easily look up the correspondences and differences.
