ArticleFrontiers in nutrition2026
Critical malnutrition thresholds and educational system constraints in Sub-Saharan Africa: implications for evidence-based nutrition policy.
Article in Frontiers in nutrition, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Child malnutrition in Sub-Saharan Africa imposes substantial hidden educational costs through neurobiological mechanisms producing irreversible cognitive impairments during the "first 1,000 days". Despite extensive micro-level evidence, macroeconomic quantification of how aggregate malnutrition constrains educational systems remains limited, particularly regarding critical threshold identification essential for geographic targeting. Methods: We integrated Hansen's Panel Threshold Regression with Temporal Graph Neural Networks analyzing 35 Sub-Saharan African countries over 1990-2024 (663 observations), enabling simultaneous identification of endogenous structural breaks and spatial interdependencies while maintaining analytical interpretability. Results: Panel Threshold Regression identified a critical threshold at 4.37% prevalence (95% CI: [3.89, 4.85])-substantially below health emergency cutoffs (WHO: 30%; UNICEF: 15%). Below this threshold (moderate regime, 22% observations, 8 countries), malnutrition was associated with a reduction in lower secondary completion of 0.31 percentage points (β Conclusion: With 78% of Sub-Saharan African countries above the 4.37% threshold, achieving SDG 4 (Quality Education) requires first addressing SDG 2 (Zero Hunger). Intensive nutrition interventions-CMAM, fortified school feeding, targeted supplementation, regional coordination through ECOWAS/ECCAS/IGAD-represent prerequisite foundational investments enabling human capital accumulation.
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