Letter to the Editor commenting on two researchers who reviewed data from MEDLINE searches from 1966 to 1995 and concluded that literature on personality disorders experienced modest expansion, unlike published works on schizophrenia, Alzheimer's disease, and posttraumatic stress disorder (PTSD). The author points out that the journal pool from which MEDLINE incorporates articles is continually changing. Journals that typically include personality disorders may have been dropped from Index Medicus and those with a focus in other areas (e.g., schizophrenia, PTSD) were added. As such, the change in bibliographic entries could be a function more of a change in the journals that contributed to the denominator of articles in the database than a change in the actual number of published articles regarding personality disorders.
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