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Cognitive-Disorder Diagnoses in Inpatient Psychosomatic-Medicine Consultations: Associations With Age and Length of Stay

Received November 15, 2004; revised August 29, 2005; accepted October 4, 2005. From the Dept. of Psychiatry and Behavioral Sciences and the Division of Biostatistics, UC Davis Medical Center. Address correspondence and reprint requests to Dr. Bourgeois, Dept. of Psychiatry and Behavioral Sciences, Univ. of California, Davis Medical Center, 2230 Stockton Blvd., Sacramento, CA 95817.
e-mail: james.bourgeois{at}ucdmc.ucdavis.edu

Authors reviewed consecutive charts of 155 cognitive-disorder patients from a psychosomatic medicine service in 2001, analyzing factors of age, cognitive-disorder diagnosis, and length of stay. Mean length of stay for this cohort exceeded the typical hospital length of stay, and decreased with age. Increased age was associated with a decreased probability of a delirium-only diagnosis, and was strongly associated with an increased probability of a dementia diagnosis. Among those with dementia, the probability of having an additional diagnosis of delirium was unrelated to age. The case-mix of cognitive disorders differs with age, whereas cognitive disorders are associated with increased length of stay for adult patients of all ages.

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