COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Treatment of schizophrenia with depot preparations of fluphenazine, haloperidol, and risperidone among inpatients at state-operated psychiatric facilities.

BACKGROUND: This study aimed to characterize the inpatient utilization of depot antipsychotics.

METHOD: The characteristics of adults with schizophrenia or schizoaffective disorder, hospitalized for at least 28 days, and who were prescribed depot antipsychotics were examined from 2004 to 2006 using a database from a large state-operated psychiatric hospital system. Demographic and clinical characteristics of patients receiving depot fluphenazine or haloperidol were compared to those prescribed depot risperidone.

RESULTS: We identified 2210 unique patients who initiated treatment with a depot antipsychotic (after receiving oral antipsychotics). Of these, 1484 (67.1%) received depot fluphenazine or haloperidol, and 726 (32.9%) received risperidone as their initial depot antipsychotic. Patients who received depot risperidone did not differ from those receiving depot fluphenazine or haloperidol with regard to demographics, diagnosis of schizoaffective disorder, number of comorbid psychiatric or medical diagnoses, or diagnosis of substance abuse. Patients started on depot risperidone during the observation period had a longer length of stay prior to initiation of depot than those started on depot fluphenazine or haloperidol (583 days vs. 237 days, t=5.489, p<.001). Patients who started on depot risperidone were less likely to be discharged on that medication than were patients who started on depot fluphenazine or haloperidol (odds ratio from Cox regression model=0.846 [95% CI 0.745-0.960]).

CONCLUSIONS: Patients initiated on depot risperidone had a longer length of stay prior to their first injection and were less likely to be discharged on that medication compared to patients initiated on depot fluphenazine or haloperidol, possibly indicating that patients initiating depot risperidone had a more severe or treatment-resistant course of illness and/or that there were reimbursement barriers for the outpatient utilization of depot risperidone, or that efficacy differences exist between the depot antipsychotics at the doses used in this population.

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