Table 2

Summary of methods

A360 countryA360 regionsStudy designOutcome evaluation study settingStudy population (sample size)Sampling strategy
Nigeria (South)Lagos, Osun, Ogun, Oyo, Edo,
Delta, Akwa Ibom		Cross-sectional before-and-after study with comparison groupOgun State:

  • Ado-Odo Ota LGA (intervention)

  • Shagamu LGA (comparison)

Unmarried girls aged 15–19 years
(12 020)
Cohabiting adults (250)		Single stage cluster design
PSU: EA
Simple random sample of EAs (approx. 710 in Ogun). All HHs visited in selected EAs. All eligible individuals to be recruited to participate.
Nigeria (North)Federal Capital Territory, Kaduna, Nasarawa Cross-sectional before-and-after study with comparison groupNasarawa State:

  • Doma LGA (intervention)

  • Toto LGA (comparison)

  • Karu LGA (intervention)

  • Nasarawa LGA (comparison)

Married girls aged 15–19 years
(4555)
Husband (250)		Single stage cluster design
PSU: EA
Simple random sample of EAs (approx. 1150 in Nasarawa). All HHs visited in selected EAs. All eligible individuals to be recruited to participate.
EthiopiaAddis Ababa,
Amhara, Dire
Dawa, Harari,
Oromia, SNNP,
Tigray		Cross-sectional before-and-after studyOromia regional state:
Wara Jarso, Lome, Ada’a, Fentale woredas		Married girls aged 15–19 years (1926)
Husband (128)		Single stage cluster design
PSU: Kebele
Probability proportional to size sample of 45 kebele. All HHs visited in selected kebele. All eligible individuals to be recruited to participate.
TanzaniaKagera, Geita,
Mwanza,
Arusha, Tabora,
Tanga, Dar es
Salaam, Mbeya,
Iringa, Morogoro		Cross-sectional before-and-after studyMwanza region:
Ilemela district (urban and semiurban wards only)		Married and unmarried girls aged 15–19 years
(4980)
Cohabiting adults (127)		Two stage cluster design
PSU: Street
Simple random sample of 30 streets. Simple random sample of 50 GPS points within each street. All HHs with front door within 20 m radius of GPS point visited. All eligible individuals recruited to participate.

  • A360, Adolescents 360; EA, enumerations area; GPS, Global Positioning System; HH, household; LGA, local government area; PSU, primary sampling unit; SNNP, Southern Nations, Nationalities and People’s Region.