Table 1 Inclusion and exclusion criteria

Service user/caregiver involvement within mental health care as main focus

Includes psychiatric conditions with an emphasis on severe mental disorders (including psychosis, schizophrenia, major depression, bipolar disorder) and their caregivers

Service user/caregiver involvement in mental health systems

Written in English language

Adults of age 18 years and above

LMICs and high income countries (no geographical limitations)

SU/CG involvement outside of health care covering non-psychiatric conditions and mental disorders other than severe mental disorders

Service user/caregiver involvement in their own treatment and care, without broader system level involvement

User/caregiver involvement as respondents of research, information and consultations/opinion giving

Written in languages other than English

Participants below age of 18 years