Table 2.

Intervention characteristics

Paper	Programme name	Delivery format	Modules	Number of sessions and intervention duration	Intervention access setting	Facilitator
Conley et al. Hundert et al.	Honest, Open, Proud-College (HOP-C)	Peer-led group programme	Three sessions programme including vignettes, role-plays, self-reflection exercises, and group discussions about disclosure, including a consideration of pros and cons of disclosing in different settings, and ways to share one’s story Booster session reviewing intervention materials	Three weekly sessions over 3 weeks, one booster session 2–3 weeks after intervention One booster session; three weeks post intervention	University	Peer facilitators with lived experience
Mulfinger et al.	Honest, Open, Proud (HOP)	Peer-led group programme	German translation of HOP programme; added vignettes about disclosure and social media	Three sessions over 3 weeks	University	Peer facilitators with lived experience
Neiderkronthentaler et al.	[Unnamed]	Video	“Thinking aloud. Jule about her depression”: video featuring lay person with personal experience of depression and suicidal ideation	One session	Online	None
Ofoegbu et al.	[Unnamed]	Video and discussion	Digital stories focused on depression and its management followed by 10–15 discussion	24 sessions over 12 weeks; ~ 30 min each	School	Therapist
Lindholm et al.	Depression in Swedish Adolescents (DISA)	Group-based classroom programme	Cognitive restructuring exercises, self-disclosure in front of classmates	Not reported	School	Teacher