The effectiveness of group treatments for people with schizophrenia has not been examined on symptom-specific (positive and negative symptoms) outcomes, and the differential effects of the most popular group treatments remain unknown. We conducted a meta-analysis of randomized controlled trials that tested (a) the effectiveness of 7 frequently used group treatments on positive and negative symptoms and (b) if treatment-specific outcome improvement was associated with improvement on schizophrenia symptoms. Major databases were searched from 1990 to 2018 for randomized controlled trials of group treatment for people with schizophrenia, including first-episode psychosis. A random effects meta-analysis and meta-regression was conducted on 52 studies representing 4,156 individuals that produced a significant, small effect on symptom-specific outcomes (g = 0.30), with 4 group treatments (cognitive remediation, multifamily, psychoeducational, and social skills training) posting significant improvement. In addition, change on treatment-specific outcomes explained 16% of schizophrenia symptom and 44% of general functioning improvement. Results are discussed with respect to how they replicate past meta-analytic findings and possible revision of practice guidelines to incorporate evidence-based group treatments for schizophrenia. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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精神分裂症的团体疗法：一项荟萃分析。

尚未针对症状特异性（阳性和阴性症状）结局检查针对精神分裂症患者的集体疗法的有效性，并且最受欢迎的集体疗法的差异效果仍然未知。我们进行了一项随机对照试验的荟萃分析，测试了（a）7种常用组疗法对阳性和阴性症状的有效性，以及（b）治疗特异性结局的改善是否与精神分裂症症状的改善相关。从1990年至2018年检索了主要数据库，以对精神分裂症患者（包括首发精神病）进行团体治疗的随机对照试验。对代表4,156个人的52项研究进行了随机效应的荟萃分析和荟萃回归，对症状特定结局的影响很小（g = 0.30），采用4组治疗（认知修复，多家庭，心理教育和社交技能培训）显着改善。此外，治疗特异性结局的改变可解释精神分裂症症状的16％和总体功能改善的44％。讨论了有关结果如何复制过去的荟萃分析发现以及可能对实践指南进行修订以合并基于证据的精神分裂症治疗的结果。（PsycInfo数据库记录（c）2020 APA，保留所有权利）。特定治疗结局的变化解释了精神分裂症症状的16％和总体功能改善的44％。讨论了有关结果如何复制过去的荟萃分析发现以及可能对实践指南进行修订以合并基于证据的精神分裂症治疗的结果。（PsycInfo数据库记录（c）2020 APA，保留所有权利）。特定治疗结局的变化解释了精神分裂症症状的16％和总体功能改善的44％。讨论了有关结果如何复制过去的荟萃分析发现以及可能对实践指南进行修订以合并基于证据的精神分裂症治疗的结果。（PsycInfo数据库记录（c）2020 APA，保留所有权利）。