Abstract Objectives Global attention to reducing childhood stunting has increased the demand for guidance on translating policies into impact. Evidence from national-level success cases is emerging but little is known about how subnational entities can accelerate change. In India, despite a common national framework of programs/policies targeting many determinants of child growth, stunting reduction has varied across states. We aimed to understand drivers of change in stunting at state-level and to identify programmatic, social and political factors that contributed to these changes. Methods We studied three states that had achieved substantial stunting declines between 2005 and 2016 [Chhattisgarh (CG) 14 percentage points (pp); Gujarat (GJ) 13pp; Odisha (OD) 11 pp]. We used regression-decomposition analysis to assess contributions of various determinants of height-for-age Z-score (HAZ) using two rounds of national data. We reviewed nutrition-relevant policies and programs linked to these drivers of change and interviewed stakeholders in government, development partners (DPs), academia and civil society (n = 61) to understand how change occurred. Results Main contributors to gains in HAZ were coverage of health and nutrition interventions (21% CG; 11% GJ; 25% OD), household assets (10% CG; 13% GJ; 18% OD), and sanitation (7% CG; 6% GJ; 5% OD). Maternal education, age at marriage, community-level hygiene, and electrification also contributed. Political leadership and an outcome-focused vision were crucial for action. Although vision varied, capable administrators were able to secure adequate finances, strengthen implementation systems, and invest in state-specific innovations, creating an enabling environment for change. Varied actors, including civil society and DPs, played a catalytic role in spurring action through advocacy, technical and financial inputs, and vigilance. Conclusions Similar drivers were responsible for stunting reduction in 3 states. Ingredients for success highlight the importance of political leadership, targeting multiple determinants and improving implementation systems. Supportive civil society, political and bureaucratic leadership motivated by the well-being of communities remain crucial. Funding Sources Bill & Melinda Gates Foundation through POSHAN, led by IFPRI.
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