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Typology of common psychiatric syndromes

An empirical study

Published online by Cambridge University Press:  03 January 2018

Patrick F. Sullivan*
Affiliation:
Virginia Commonwealth University, Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics
Kenneth S. Kendler
Affiliation:
Virginia Commonwealth University, Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics
*
Dr Sullivan. Department of Psychiatry, Virginia Institute for Psychiatrie and Behavioral Genetics. PO Box 980126. Richmond, VA 23298-0126, USA. Tel: 804-828-8129; Fax: 804-828-1471

Abstract

Background

Diagnostic comorbidity is prevalent in psychiatry and may be inadequately captured by the DSM-III/III-R nosology.

Methods

The lifetime presence of 11 psychiatric diagnoses was determined by structured personal interviews of a population-based sample of 1898 female twins. We used latent class analysis to derive an empirical typology.

Results

Six classes provided the best fit to the data. Their mnemonics were: minimal disorder (60% of the sample), major depression -generalised anxiety disorder (19%), alcohol–nicotine (7%), highly comorbid major depression (5%) and eating disorders (3%). The validity of this typology was strongly supported by demographic, health, personality and attitudinal validators along with the significant monozygotic twin concordance for class membership. The typology superficially resembled DSM-III-R, but contained many differences. Major depression appeared in three forms (alone, with generalised anxiety disorder and with considerable comorbidity). Alcoholism-nicotine dependence and the various anxiety disorders formed discrete classes, but were also prominent in other classes. Bulimia and anorexia were exceptional in their appearance in a single class.

Conclusions

The DSM-III-R and closely related DSM-IV nosology did not capture the natural tendency of these disorders to co-occur. Fundamental assumptions of the dominant diagnostic schemata may be incorrect.

Type
Papers
Copyright
Copyright © 1998 The Royal College of Psychiatrists 

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