MFHS is a group-based, trauma-informed, family-systems intervention developed for post-genocide Rwanda. It combines psychoeducation, structured dialogue, family communication and problem-solving exercises, parenting and couple-relational work, and youth voice and identity activities. The intervention was delivered in intergenerational, whole-family, parent-only, and youth-only formats. MFHS comprised 18 core 3-hour meeting occasions, with parent-only and youth-only sessions delivered in parallel, plus four planned follow-up sessions where relevant.
Participants were identified through a broader Rwanda societal-healing screening process. Screening was conducted at the individual level, but MFHS invitation occurred at the family level: if any screened individual met the MFHS family-communication criterion, that person's family was invited. The audited screening workbook contained 4,214 adult/community screening records. After referral/triage for severe clinical flags and other staged interventions, 839 screened individuals were staged to MFHS. At the cell level, 56 eligible cells had enough staged MFHS-screened individuals to form a group; those cells contained 794 staged MFHS-screened individuals. Twenty trial clusters were randomly selected from the eligible cells and then allocated to MFHS or waitlist control. The final baseline cohort included 319 family members in 20 clusters: 167 in MFHS clusters and 152 in waitlist-control clusters.
The primary manuscript analysis is a baseline-cohort intention-to-treat analysis. All baseline-assessed participants were retained in their final fielded cluster allocation. Missing endline outcomes for 36 participants were handled through multiple imputation. Effects were estimated with baseline-adjusted cluster-level Analysis of Covariance (ANCOVA) weighted by baseline cluster size, with complete-case and unweighted analyses retained as sensitivity checks.