Table 1.

Inclusion and Exclusion Criteria

Inclusion criteria

Peer-reviewed full-text articles published in English during (2000–2020) that meet all the following criteria: Paid/employed PSWs who provide intentional peer support, exclusive of voluntary, unpaid peer support A broad range of mental health services including behavioral health topics that overlapped with mental health and substance abuse Explicit indication of implementation, integration, or management of PSW role in mental health systems or settings

Exclusion criteria

Excluded if one or more of the following criteria are met: PSW interventions in areas other than mental health, e.g., neonatal care, diabetes, and other illnesses Mental health settings other than community or inpatient settings accessible to the public, for example, secured forensic mental health settings Editorials, conference proceedings, dissertations PSW role implementation under COVID-19 conditions