Peer Support Interventions

General Description

The data-peer-support dataset is a meta-analytic research domain (MARD) which is part of the Metapsy project. The dataset contains study information and effect size data of randomized trials on peer support interventions for individuals with mental illness. More details about this database can be accessed in the published meta-analysis.

This dataset includes peer support interventions (PSIs) vs. control (PSIs vs ctr) comparisons. Effect sizes are provided for three types of recovery outcomes at post-test: clinical recovery, personal recovery, and functional recovery. It includes one type of effect size calculation per study, giving priority to means and standard deviations at post-test, followed by change scores, binary outcomes, and other statistics.

The dataset follows the Metapsy data standard. All included information has been independently extracted by two researchers.

Affiliated Institutions

Radboud University Medical Center, Vrije Universiteit Amsterdam

Online Meta-Analysis Tool

A simplified version of this database can be analyzed at


  • metapsyData Shorthand:
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  • License: ODC-By v1.0
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Variable Description

Study References

Database Flowchart

The study flow of this database can be found below.

Further Information

  • The full protocol of the METAPSY project, depression MARD
  • The main paper reporting the results of a meta-analysis using the peer support database
  • A paper summarizing main results of the Metapsy depression domain
  • Published meta-analyses using the depression database
  • Published 'individual participant data' meta-analyses, based on the database


. Database of peer support for individuals with mental illness. Part of the Metapsy project (Version ). URL DOI .