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Effectiveness of paliperidone extended-release for patients with schizophrenia: focus on subjective improvement


Correspondence to: Chul-Eung Kim, MD, PhD, Department of Psychiatry, Inha University Hospital, 7-206, 3-ga, Shinheung-dong, Jung-gu, Incheon, 400-711, Korea. Tel: +82-32-890-3475; Fax: +82-32-890-3558. E-mail:

Co-correspondence to: Yong-Sik Kim, MD, PhD, Department of Psychiatry, Dongguk University College of Medicine, Ilsan Hospital, 814, Siksa-dong, Ilsandong-gu, Goyang, Gyeonggi-do, 410-773, Korea. Tel: +82-31-961-7235; Fax: +82-31-961-7236. E-mail:



This study assessed whether the subjective experience of patients with schizophrenia improved after switching from an oral antipsychotic to flexibly-dosed paliperidone extended-release.


We conducted a 24-week, multicenter, non-comparative, open-label trial. A total of 387 patients with schizophrenia participated the study. The primary study outcome was the change in subjective symptoms measured by the Symptom Checklist-90-Revised version (SCL-90-R) from baseline. Visual analogue scales were used for sleep and daytime somnolence as secondary subjective assessments. The clinical global impression-schizophrenia-severity scale was used to assess overall symptom severity. Social functioning was evaluated by the personal and social performance scale. Adverse events were also evaluated.


All subjective symptoms measured by the SCL-90-R improved significantly. The early responders, who achieved >20% reduction in the SCL-90-R within 1 week, maintained significantly lower severity through the 24 weeks. The clinical global impression-schizophrenia-severity scale and personal and social performance scores also improved significantly. The visual analogue scales revealed that daytime somnolence improved significantly, whereas nocturnal sleep quality was unaltered.


Our results suggest that switching to paliperidone extended-release was associated with improvements in various subjective symptoms, decreased overall symptom severity, and increased social functioning. The results also suggest that early detection and reduction of subjective symptoms are important for treatment outcome. Copyright © 2013 John Wiley & Sons, Ltd.