Advanced Search

The American Journal of Psychiatry, VOL. 128, No. 8

Articles | February 01, 1972

Schizophrenia in Veteran Twins: A Diagnostic Review

MARTIN G. ALLEN; STEPHEN COHEN; WILLIAM POLLIN

Am J Psychiatry 1972;128:939-945.

View Article Information

Assistant Professor of Psychiatry, Georgetown University Medical School, 3800 Reservoir Rd., N.W., Washington, D.C. 20007

Clinical Associate, Section on Twin and Sibling Studies, Adult Psychiatry Branch, National Institute of Mental Health, Bethesda, Md.

Chief, Section on Twin and Sibling Studies, Adult Psychiatry Branch, National Institute of Mental Health, Bethesda, Md.

1972, American Psychiatric Association

An erratum to this article has been published | view the erratum

Article

text A A A

PDF of the full text article.

Abstract

The authors performed a systematic diagnostic review of the records of all twin pairs with a psychotic diagnosis in the Veteran Twin Registry. They found 274 pairs of twins (313 individuals) in which one or both were "clearly" schizophrenic, a frequency of 0.98 percent. The monozygotic (MZ) concordance was 27.4 percent, the dizygotic (DZ) concordance was 4.8 percent, and the MZ/DZ ratio was 5.7. Compared with the results of a computer search, these results present a higher MZ concordance and MZ/DZ ratio. The authors also review the results of the major twin studies of schizophrenia, which indicate that both genetic and environmental factors are significant in the occurrence of schizophrenia.

Figures in this Article

Your Session has timed out. Please sign back in to continue.

Username

Password

Sign in via Athens (What is this?)

Athens is a service for single sign-on which enables access to all of an institution's subscriptions on- or off-site.

Forgot Password?

Not a subscriber?

Subscribe Now/Learn More

Purchase Online access to this article for 24 hours

PsychiatryOnline subscription options offer access to the DSM-IV-TR® library, books, journals, CME, and patient resources. This all-in-one virtual library provides psychiatrists and mental health professionals with key resources for diagnosis, treatment, research, and professional development.

Need more help? PsychiatryOnline Customer Service may be reached by emailing PsychiatryOnline@psych.org or by calling 800-368-5777 (in the U.S.) or 703-907-7322 (outside the U.S.).

CME Activity

There is currently no quiz available for this resource. Please click here to go to the CME page to find another.

Submit a Comments

Please read the other comments before you post yours. Contributors must reveal any conflict of interest.
Comments are moderated and will appear on the site at the discertion of JBJS editorial staff.

* = Required Field

Comment Author(s)*(if multiple authors, separate names by comma)

Example: John Doe

Affiliation & Institution*

Comment Title*

Comment*

Cancel

Topics

Product Recommendation

CME Activity