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Clinical outcomes of long-acting injectable risperidone in patients with schizophrenia: six-month follow-up from the Electronic Schizophrenia Treatment Adherence Registry in Latin America

Authors Apiquian R, Cordoba R, Louzã MR

Published 22 December 2010 Volume 2011:7(1) Pages 19—26

DOI https://doi.org/10.2147/NDT.S15911

Review by Single-blind

Peer reviewer comments 2

Rogelio Apiquian1, Rodrigo Córdoba2, Mario Louzã3
1Americas University, Behavior and Development Sciences Division, Mexico City, Mexico; 2Nervous System Research Center-CISNE, Bogota, Colombia; 3Schizophrenia Research Program, Institute of Psychiatry, Faculty of Medicine, University of São Paulo, Brazil

Background: Risperidone long-acting injection (RLAI) has been shown to be efficacious, improve compliance, and increase long-term retention rate on therapy. The aim of this work was to determine the effect of RLAI on clinical outcome and hospitalization rate in patients with schizophrenia or schizoaffective disorder enrolled in the electronic Schizophrenia Treatment Adherence Registry in Latin America.
Methods: Data were collected at baseline, retrospectively for the 12 months prior to baseline, and prospectively every three months for 24 months. Hospitalization prior to therapy was assessed by a retrospective chart review. Efficacy and functioning were evaluated using Clinical Global Impression of Illness Severity (CGI-S), Personal and Social Performance (PSP), and Global Assessment of Functioning (GAF) scores. Relapse and treatment were also registered.
Results: Patients were recruited in Mexico (n = 53), Brazil (n = 11), and Colombia (n = 15). Sixty-five percent (n = 52) were male, and mean age was 32.9 years. Patients were classified as having schizophrenia (n = 73) or schizoaffective disorder (n = 6). The mean dose of RLAI at six months was 34.1 mg (standard deviation = 10.2 mg). The percentage of hospitalized patients before treatment was 28.2% and 5.1% at six months after initiating RLAI (P < 0.001). Significant changes were registered on CGI-S, GAF, and PSP scores.
Conclusions: RLAI was associated with an improvement in clinical symptoms and functioning, and a greater reduction in hospitalization.

Keywords: long-acting, risperidone, schizophrenia, schizoaffective disorder, Latin America

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