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Brief Reports   |    
Antipsychotic Formulation and One-Year Rehospitalization of Schizophrenia Patients: A Population-Based Cohort Study
Shiau-Shian Huang, M.D.; Ching-Heng Lin, Ph.D.; El-Wui Loh, Ph.D.; Hsin-yu Yang, M.D.; Chin Hong Chan, M.D., M.A.M.; Tsuo-Hung Lan, M.D., Ph.D.
Psychiatric Services 2013; doi: 10.1176/appi.ps.201200506
View Author and Article Information

Dr. Huang, Dr. Yang, Dr. Chan, and Dr. Lan are with the Department of Psychiatry and Dr. Lin is with the Department of Medical Research, Taichung Veterans General Hospital, No. 160, Sec. 3, Chung-Kang Rd., Taichung 40705, Taiwan (e-mail Dr. Lan: tosafish@gmail.com). Dr. Lan is also with the School of Medicine, National Yang-Ming University, Taipei. Dr. Loh is with Kaohsiung Municipal Kai-Syuan Psychiatric Hospital, Kaohsiung City, Taiwan.

Copyright © 2013 by the American Psychiatric Association

Abstract

Objective  The authors compared the efficacy of long-acting injectable antipsychotics and oral antipsychotics on rehospitalization rate of community-dwelling patients with schizophrenia who had frequent admissions.

Methods  The cohort study of 14,610 patients was conducted by analyzing the Taiwan National Health Research Institutes data. The patients were divided into groups that received oral antipsychotics (risperidone, a different second-generation antipsychotic, or a first-generation antipsychotic) or long-acting injectable antipsychotics (risperidone, haloperidol, or flupenthixol).

Results  One-year rehospitalization rates of the final cohort of 10,552 patients were the same for both groups (by long-acting injection, 27.3%; by oral administration, 27.3%). Secondary analysis of groups receiving long-acting injectable medication showed that haloperidol resulted in lower rehospitalization rates (haloperidol, 22.5%; risperidone, 27.1%; and flupenthixol, 29.5%). Patients’ characteristics, including age, region, and insurance payments were significantly correlated with the risk of relapse (p<.05).

Conclusions  Except for injectable haloperidol, long-acting injectable antipsychotics seem not to be superior to oral antipsychotics in reducing rehospitalization.

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Table 1Rehospitalization rates of 10,552 patients with schizophrenia within one year
Table Footer Note

a Calculated with long-acting injectable haloperidol as the reference

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