Table 2.

Qualitative methods in each of the three case studies before cross-case analysis

Study	Country	Sites	Participants	Methods
Taylor et al., 2015 [22]	Brazil	2 urban	Study total: 60 interviews, 6 focus group discussions (FGDs), n = 295 in survey Girls (aged 12–18 years) in unions with adult men (24–60 years)	In-depth semistructured interviews, FGDs; household survey
			Men, family members of married girls, and organizations working with children and youth	Interviews and FGDs
Murphy-Graham and Leal 2015 [29]	Honduras	10 rural	36 girls (12–18 years) in unions with adult men (24–60 years)	Semistructured interviews
			30 secondary school teachers	Interviews and FGDs
			20 family members of 8 girls who entered into unions with adult men	Interviews and FGDs
			10 girls who entered into early unions between the ages of 12–20 years	Longitudinal data collection
Vaitla et al., 2017 [15]	Guatemala	1 Rural	Study total: 58 participants Young women (unmarried/married) 12 family members, 9 local leaders, mentors	Semistructured interviews and discussions; document review and ethnography conducted by the Population Council