Does Lack of a Consistent Definition Hinder Treatment for Clozapine-Resistant Schizophrenia Patients?

Mental Health Matters

Research Paper Title

Characteristics and definitions of ultra-treatment-resistant schizophrenia – A systematic review and meta-analysis.

Background

The aim of this systematic review and meta-analysis was to characterise ultra-treatment-resistant Schizophrenia also known as clozapine-resistant schizophrenia (CRS) patients across clozapine combination and augmentation trials through demographic and clinical baseline data. Furthermore, the researchers investigated the variability and consistency in CRS definitions between studies.

Methods

Systematic searches of articles indexed in PubMed, EMBASE, the Cochrane Central Register of Controlled Trials (CENTRAL) and PsycINFO were conducted in March 2020. 1541 randomised and non-randomised clinical trials investigating pharmacological and non-pharmacological clozapine add-on strategies were screened and a total of 71 studies were included. The primary outcome was the overall symptom score at baseline, measured with Positive and Negative Syndrome Scale (PANSS) total or Brief Psychiatric Rating Scale (BPRS) total scores.

Results

Data from 2731 patients were extracted. Patients were overall moderately ill with a mean…

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