Table 1.

Participants, their numbers and location, and core areas explored in the interviews

Participants, N and location	Interview type	Core areas explored
Sample 1. Depressed pregnant adolescents, (N = 8 from Kariobangi site)	Key informant interviews	Their personal/emotional experiences, relationships, and circumstances of pregnancy, family and social support available, interface with health facility, plans for future
Sample 2. Caregivers of pregnant adolescents (N = 6 from both sites)	Key informant interviews	Their reaction to the pregnancy, resources available to support the adolescent, plans for future for adolescent and the baby, support from community and CHWs
Sample 3. (i) Follow-up from sample 1: new adolescent mothers who gave birth, (N = 9 from both sites); (ii) new adolescent mothers: (N = 13 from Kariobangi site)	(i) Key informant interviews (ii) One focused group discussion	Reflecting on their experience of pregnancy, evaluation of support available from family, partner, health facility, and CHWs. Knowledge about adolescent pregnancy, their mental health problems, referrals and support available to them and their caregivers, challenges in working with this group
Sample 4. HW, CHWs, MCH staff/medical staff, (N = 20 from both sites)	Two focused group discussions	Experience and knowledge about adolescent pregnancy and their mental health problems, referrals and health facility support and engagement, challenges in being a bridge between families and the health care system