Table 1.

Inclusion and exclusion criteria

Topic	Criteria
Population	Youth and families living in a low and middle-income country as defined by The World Bank Group in 2015 (World Bank, 2015) or at the time of the trial (e.g., trials conducted in Chile prior to Chile becoming a high-income country). Consistent with prior LMICs reviews (van Ginneken 2013), Taiwan was grouped with China, even though Taiwan is categorized as HIC.
Intervention	Psychosocial intervention, promotion and prevention programs that include a family component (e.g. targeted the parent-child relationship, household organization, or whole family functioning). Examples include universal health promotion programs, parenting programs, family therapy programs, and child mental health interventions with a family component. Self-help and support group interventions were excluded. Intervention providers were limited to non-specialist providers, as defined as an individual with no prior structured training in mental health or prior credentials as a mental health care provider.
Comparison	Only trials including random assignment and a control comparison group were included.
Outcome	Youth mental health included indicators of positive mental health such as self- esteem, self-efficacy, coping skills, resilience, emotional wellbeing; negative mental health such as depression, anxiety, psychological distress, suicidal behavior; and wellbeing indicators such as social participation, empowerment, communication and social support.