The DSM evolved from systems for collecting census and psychiatric hospital statistics, as well as from a United States Army manual. Revisions since its first publication in 1952 have incrementally added to the total number of mental disorders, while removing those no longer considered to be mental disorders.
^Baca-Garcia, Enrique; Perez-Rodriguez, Maria M.; Basurte-Villamor, Ignacio; Fernandez Del Moral, Antonio L.; Jimenez-Arriero, Miguel A.; Gonzalez De Rivera, Jose L.; Saiz-Ruiz, Jeronimo; Oquendo, Maria A. (March 2007). "Diagnostic stability of psychiatric disorders in clinical practice". British Journal of Psychiatry. 190 (3): 210–216. doi:10.1192/bjp.bp.106.024026. PMID17329740. S2CID4888348.
^Pincus, Harold Alan; Zarin, Deborah A.; First, Michael (1 December 1998). "'Clinical Significance' and DSM-IV". Archives of General Psychiatry. 55 (12): 1145, author reply 1147–8. doi:10.1001/archpsyc.55.12.1145. PMID9862559.