Psychiatric Quarterly [psaq] ph183-psaq-460938 June 5, 2003 12:45 Style ﬁle version June 4th, 2002
Psychiatric Quarterly, Vol. 74, No. 3, Fall 2003 (
A COMPARISON OF SCHIZOPHRENIC
PATIENTS WITH OR WITHOUT
COEXISTING SUBSTANCE USE DISORDER
Coreen Farris, B.A., Christiane Brems, Ph.D.,
Mark E. Johnson, Ph.D., Rebecca Wells, S.M.,
Randall Burns, M.S., and Nicholas Kletti, M.D.
Increasing numbers of research investigations have documented psychosocial,
demographic, and treatment course differences between schizophrenic patients
with and without additional substance use disorder. However, many of these
studies have failed to control for additional psychiatric diagnoses. This study
sought to elucidate differences between schizophrenic patients with versus
without coexisting substance use disorder, while controlling for the possible
confounding impact of additional Axis I or Axis II diagnoses. We explored the
records of 308 psychiatric inpatients who were either solely diagnosed with
schizophrenia or solely diagnosed with coexisting schizophrenia and substance
use disorder. We compared these two groups on a variety of psychosocial, demo-
graphic, and clinical variables shown in prior research to differentiate these
two types of patients. Findings revealed that substance use interacts with
schizophrenia to increase psychiatric admissions and decrease lengths of stay
Coreen Farris, B.A., Christiane Brems, Ph.D., ABPP, Mark E. Johnson, Ph.D., and
Rebecca Wells, S.M., are afﬁliated with Department of Psychology, University of Alaska,
Randall Burns, M.S., and Nicholas Kletti, M.D., are afﬁliated with Alaska Psychiatric
Institute, Anchorage, Alaska.
Address correspondence to Christiane Brems, Ph.D., ABPP, 3211 Providence Drive,
Anchorage, AK 99508; e-mail: firstname.lastname@example.org.
2003 Human Sciences Press, Inc.