Summary
This analysis of Ethiopia's 2015 National Micronutrient Survey reveals that 77.9% of non-pregnant women of reproductive age had low RBC folate concentrations, with spatial clustering of folate status evident at distances ≤300 km. Folate nutrition varied markedly by farming system, with women in fish-based systems (median RBC folate 1036 nmol/L) showing substantially higher status than those in highland sorghum-chat mixed systems (median 386.7 nmol/L). These findings suggest that local food production systems significantly influence folate availability and that geographically-targeted nutrition interventions could address the widespread risk of neural tube defect-affected pregnancies in Ethiopia.
UK applicability
Whilst the UK has fortification programmes and higher baseline micronutrient intakes, this study's methodology linking farming systems to micronutrient status may inform assessment of regional nutrition variation in populations with lower dietary diversity or in low-income communities. The spatial dependence finding could inform UK public health surveillance design.
Key measures
Serum folate concentration (nmol/L), RBC folate concentration (nmol/L), prevalence of folate deficiency based on homocysteine concentration, spatial dependency at distance thresholds (≤300 km), folate concentration by farming system type
Outcomes reported
The study measured serum and RBC folate concentrations among women of reproductive age and explored their spatial distribution and association with dominant local farming systems. National prevalence of folate deficiency was assessed using homocysteine as a metabolic indicator, with marked variation observed between farming system types.
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