Data collection
Baseline data collection occurred between April and September 2016 and a follow-up survey was conducted between September and December 2017. Men and their female partners were invited to participate in the interviews. Electronic data collection was completed by gender-matched enumerators. For sensitive outcomes, audio computer assisted self-interviews (ACASI) were used in order to limit potential under-reporting. The survey was developed in French and subsequently translated and back translated into Kiswahili, Mashi, and Kinyarwanda languages. Ethical approval was received from International Rescue Committee’s Internal Review Board with approval number IRB #: 00009752 on March 7, 2016 and from the DRC Ministry of Women, Family, and Children with approval number # 433/DR/IRC/015. Informed oral consent was obtained from all participants and established global guidelines on conducting ethical violence against women research were followed. Waiver of parental consent was obtained for participants ages 15–17.At baseline, 1,387 men and 1,220 women were interviewed. Loss to follow up was low as 97% of male and 96% of female baseline respondents were retained at endline. 