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Descriptive analyses of the aripiprazole arm in the risperidone long-acting injectable versus quetiapine relapse prevention trial (ConstaTRE)


A recent randomized, open-label, relapse prevention trial (ConstaTRE) compared outcomes with risperidone long-acting injectable (RLAI) versus the oral atypical antipsychotic quetiapine. This study also included a small descriptive arm in which patients could also be randomized to aripiprazole. Results of this exploratory analysis are described here. Clinically stable adults with schizophrenia or schizoaffective disorder previously treated with oral risperidone, olanzapine, or an oral conventional antipsychotic were randomized to RLAI or aripiprazole. Efficacy and tolerability were monitored for up to 24 months. A total of 45 patients were treated with aripiprazole (10–30 mg/day) and 329 patients with RLAI (25–50 mg i.m. every 2 weeks). Relapse occurred in 27.3% (95% CI: 15.0–42.8%) of aripiprazole-treated and 16.5% (95% CI: 12.7–21.0%) of RLAI-treated patients. Kaplan–Meier estimates of mean (standard error) relapse-free period were 313.7 (20.4) days for aripiprazole and 607.1 (11.4) days for RLAI patients. Remission was achieved by 34.1% (95% CI: 20.5–49.9%) of aripiprazole and 51.1% (95% CI: 45.5–56.6%) of RLAI patients. Clinical global impression–change was improved (“minimally improved” to “very much improved”) in 26.4% with RLAI and 15.9% with aripiprazole patients. Tolerability was generally good for both treatment groups. Weight gain (7.0% with RLAI vs. 4.4% with aripiprazole), extrapyramidal adverse events (AEs) (10.3% vs. 4.4%), and potentially prolactin-related AEs (4.6% vs. 0%) were more common with RLAI treatment, and gastrointestinal disorders were more common in aripiprazole-treated patients (22.2% vs. 6.1%). Time-to-relapse in stable patients with schizophrenia or schizoaffective disorder was numerically longer in RLAI-treated patients than in aripiprazole-treated patients although not statistically significant. Both treatments were generally well tolerated.

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The study, editorial and writing support were sponsored by Janssen Pharmaceutical Companies of Johnson & Johnson in EMEA. The authors would like to acknowledge Dr Rossella Medori for trial design and medical conduct supervision. Dr Medori was European Medical Director at Janssen–Cilag during study conduct and analysis. Paul Bergmans from Janssen–Cilag BV, Netherlands, is also acknowledged for providing statistical analyses. Editorial and writing support was provided by Remon van den Broek and team from Excerpta Medica.

Conflict of interest

Dr De Arce has received research grants, and served as consultant, advisor, or speaker for the following companies: AstraZeneca, Bristol–Myers Squibb, Eli Lilly, GlaxoSmithKline, Janssen–Cilag, Novartis, Bristol, Pfizer Inc, sanofi-aventis, and UCB Pharma. Dr Eding declares to have no conflict of interest. Dr Marques–Teixeira declares to have no conflict of interest. Dr Milanova declares to have no conflict of interest. Dr Rancans has received speaker fees from Gedeon Richter, Grindeks, sanofi-aventis, and Servier, consultancy fees from Gedeon Richter; and investigator fees from Janssen–Cilag. Dr Schreiner is a full employee of Janssen–Cilag GmbH, Germany.

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Correspondence to Rosario de Arce Cordón.

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de Arce Cordón, R., Eding, E., Marques-Teixeira, J. et al. Descriptive analyses of the aripiprazole arm in the risperidone long-acting injectable versus quetiapine relapse prevention trial (ConstaTRE). Eur Arch Psychiatry Clin Neurosci 262, 139–149 (2012).

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  • Antipsychotic
  • Atypical
  • Relapse
  • Schizoaffective disorder—schizophrenia