“We help people change harmful norms”: Working with key opinion leaders to influence MNCH+N behaviors in Nigeria.

Abstract Background: Nigeria’s Maternal, newborn, and child health and nutrition (MNCH+N) outcomes rank among the world’s poorest. Engaging traditional and religious leaders shows promise in promoting related behaviors. The Breakthrough ACTION/Nigeria project worked with leaders in northern Nigeria to implement the Advocacy Core Group (ACG) model, a social and behavior (SBC) approach aimed at influencingcommunity norms and promoting uptake of MNCH+N behaviors. Qualitative assessment of the model contributes to evidence on SBC approaches for enhancing integrated health behaviors. Methodology: This qualitative study was conducted in Nigeria's Bauchi and Sokoto states in May 2021. It involved 51 in-depth interviews and 24 focus group discussions. The study was grounded in the social norms exploration (SNE) technique to examine normative factors influencing behavior change within the ACG model context. Data analysis used a reflexive thematic analysis approach. Ethical approvals were received from all involved institutions and informed consent was obtained from participants. Results: The ACG model was vital in the uptake of MNCH+N behaviors. The influence of ACG members varied geographically with greater impact observed in Sokoto State. Normative barriers to improving MNCH+N outcomes included perceived religious conflicts with family planning, preference for traditional care in pregnancy, misinformation on exclusive breastfeeding (EBF), and gender-based violence resulting from women's decision-making. The study demonstrated positive progress in norm shifting, but EBF and GBV norms showed slower changes. Broader challenges within the health system, such as inadequate services, negative attitudes of healthcare providers, and workforce shortages, hindered access to care. Conclusion: The ACG model increased awareness of health issues and contributed to potential normative shifts. However, slower changes were observed for EBF and GBV norms and broad health system challenges were reported. The model appears to be a promising strategy to further drive SBC for better health outcomes, especially where it is combined with supply-side interventions.