Diagnostic confusion in treatment-refractory psychotic patients.
BACKGROUND
Two surveys of diagnostic practices in the United States suggest that many clinicians base their diagnoses on presenting symptoms and pay little attention to course and exclusionary criteria. Failure to correctly diagnose patients may result in inappropriate therapy and poor treatment response. The purpose of the present study was to investigate diagnostic practices.


METHODS
We made detailed assessments of 50 consecutively admitted treatment-refractory psychotic patients and carefully applied DSM-III-R criteria.


RESULTS
Referral diagnoses were changed in 23 of the 50 patients. Diagnoses of schizophrenia and schizoaffective disorder were made far less frequently and mood disorders (bipolar disorder and major depression) were diagnosed far more frequently by our group than by referring psychiatrists. Patients whose diagnosis was changed were more likely to be given mood-stabilizing medication and tended to show more improvement than patients whose diagnosis was not changed.


CONCLUSIONS
These findings raise the possibility that patients may not respond to treatment because incorrect diagnoses result in inappropriate treatment.
Refractory Psychosis Unit, Riverview Hospital, Port Coquitlam, British Columbia, Canada.
G N
GN
Smith
G W
GW
MacEwan
R J
RJ
Ancill
W G
WG
Honer
T S
TS
Ehmann
D000293:Adolescent; D000328:Adult; D014150:Antipsychotic Agents / Q000009:adverse effects / Q000627:therapeutic use; D003866:Depressive Disorder / Q000175:diagnosis / Q000188:drug therapy; D003951:Diagnostic Errors; D004409:Dyskinesia, Drug-Induced / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000175:diagnosis* / Q000188:drug therapy; D012017:Referral and Consultation; D012559:Schizophrenia / Q000175:diagnosis / Q000188:drug therapy
D014150:Antipsychotic Agents