Table 1.

Search terms used for the formulation of the search strings in the systematic search

PICO concept	Search terms
Population	Adolescents, youth, young person, young people, teenager (10–18 years) and emerging adults (19–25 years)
Intervention (or Exposure)	self-esteem, self-worth, self-regard, self-evaluation, self-compassion, self-blame, self-acceptance, self-concept, self-understanding, self-description, self-identity, self-awareness, self-image, self-liking, self-confidence, self criticism, self-efficacy, self-regulation, emotional regulation, self-control, self-autonomy, self determination, self-consciousness, self-competence, self-presentation
Comparison	None
Outcome	Anxiety, depression, mental well-being, psychological well-being, distress, loneliness, internalizing symptom*, externalizing symptom*, internalizing symptom*, externalizing symptom

Note. Included both UK and US spelling for all the search terms listed.