This work may not be copied, distributed, displayed, published, reproduced, transmitted, modified, posted, sold, licensed, or used for commercial purposes. By downloading this file, you are agreeing to the publisher’s Terms & Conditions.

Original Research

Effects of Patient Demographics, Risperidone Dosage, and Clinical Outcome on Body Weight in Acutely Exacerbated Schizophrenia

Hsien-Yuan Lane, MD, PhD; Yue-Cune Chang, PhD; Yiao-Cheung Cheng, MD; Guang-Chyi Liu, MD, MS; Xing-Ru Lin, BS; and Wen-Ho Chang, MD

Published: March 15, 2003

Article Abstract

Background: Predictors for risperidone-related weight gain remain unclear. This study aimed to identify clinical factors influencing body weight in risperidone-treated patients.

Method: One hundred forty-six newly hospitalized DSM-IV schizophrenia patients with acute exacerbation entered this prospective, 6-week, repeated-measures trial. The mean ± SD risperidone dose was 4.3 ± 1.4 mg/day at week 6. Efficacy, body weight, and tolerability were measured biweekly. Efficacy was assessed with the Positive and Negative Syndrome Scale (PANSS) and the Nurses’ Observation Scale for Inpatient Evaluation (NOSIE). For determining the impacts of possible prognostic factors on body weight, we utilized generalized estimating equation methods to control for other variables and the within-subject dependence over repeated assessments.

Results: After the effects of other factors (including baseline body weight) were adjusted, every 1-week increase in treatment duration raised body weight by 0.442 kg (p < .0001). Increasing baseline body weight by 1 kg reduced weight gain by 0.022 kg (p < .0001). Every 1-year increment in age decreased body weight by 0.052 kg (p < .001). Undifferentiated subtype predicted higher weight by around 0.9 kg than other subtypes (p = 20%) also had higher weight by 0.513 kg on average (p = .007). Specifically, every 1-point diminution in score in PANSS total, PANSS positive, PANSS negative, PANSS cognitive, and NOSIE increased body weight, on average, by 0.029 kg, 0.057 kg, 0.079 kg, 0.079 kg, and 0.035 kg, respectively (p <= .009). Other variables did not have significant influences.

Conclusion: The results suggest that lower initial body weight, younger age, undifferentiated subtype, higher dosage, and treatment response (for positive, negative, and cognitive symptoms and social functioning) are associated with greater weight gain in acutely ill patients treated with risperidone. Further studies with longer observation and in other populations are needed.

Volume: 64

Quick Links:

Continue Reading…

Subscribe to read the entire article


Buy this Article as a PDF