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Download Diet Matters - Food and Agriculture Organization of the United Nations
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Diet Matters: Approaches and Indicators to Assess Agriculture's Role in Nutrition Diego Rose, Brian Luckett, and Adrienne Mundorf School of Public Health & Tropical Medicine Tulane University Main objectives • Outline plausible mechanisms in which agriculture and food-based interventions can improve nutrition through the diet pathway • Identify approaches and indicators to measure progress in this area Outline • Augmented Causal Framework • Indicators – Individual – Household – National • Data Collection Systems • Recommendations A Standard Framework Outlining Causes of Undernutrition Short-term consequences Long-term consequences Outcomes Maternal and child undernutrition Immediate causes Underlying causes Inadequate dietary intake Household Food Insecurity Inadequate care and feeding practices Disease Unhealthy household environment and inadequate health services Household access to adequate resources: land, education, employment, income, technology Basic causes Inadequate financial, human, physical and social capital Sociocultural, economic, and political context Zoom-in on determinants of household food security Household Food Security Own production (food & cash crops, livestock, fish farm) Gathering Fishing Hunting Food receipts Sales Nonagricultural production Trading (Adapted from WFP, 2005) Food purchases Cash income Employment Cash receipts Debts A Standard Framework Outlining Causes of Undernutrition Short-term consequences Long-term consequences Outcomes Maternal and child undernutrition Immediate causes Underlying causes Inadequate dietary intake Household Food Insecurity Inadequate care and feeding practices Disease Unhealthy household environment and inadequate health services Household access to adequate resources: land, education, employment, income, technology Basic causes Inadequate financial, human, physical and social capital Sociocultural, economic, and political context Individual-Level Measures • Dietary outcomes are challenging due to multidimensionality – many nutrients, all essential • So, aggregation of data into a single index – e.g. Mean Probability of Adequacy • Measurement is also challenging, costly – diet is a complex set of behaviors – 'Gold standard' methods are costly • Proxies for diet quality – simple indicators of diet diversity Dietary Proxy Validation Research Lack of universal approaches • Different indicators – Foods, food groups, fd grp systems ± min quantity • Many different benchmarks – MAR, MPA, MMDA – Several different cutoff points – 50%, 75%, etc • Different collection methods – Weighed food record, 24-hour recall, food frequency • Different criteria – Correlations, sensitivity, specificity, area under ROC, prediction equations Diet Proxy Validation Research Outcomes • Modest predictive power – good for population monitoring: project process, trends over time, or general planning – not good for evaluating impact • Best proxies tend to be country-specific • Elimination of 'minimum quantities' improves estimates – can it be implemented in a low-cost field method? Household Level Measures Food Expenditure Modules • Energy availability, food poverty – household food security interventions • Food group availability – biofortification studies – other specific crop/livestock interventions Household Level Measures Diversity Proxy Indicators • Household Diet Diversity Score – 16 groups in data collection collapsed to 12 – 24 hr recall (not quantitative) – 1 point for each group • Food Consumption Score – 8 groups – 1 week food frequency – weights used in calculation Country Level Measures Using Food Supply Data • Prevalence of undernourishment – energy per capita + distributional measure + threshold • Micronutrient densities – micronutrients per 1000 kilocalories – compared to micronutrient density goals • Healthy eating index – score based on U.S. diet guidelines – food groups, negative components (fats, sugars) Data Collection Systems • Demographic and Health Surveys – Measure USAID • Multiple Indicator Cluster System – UNICEF • Living Standard Measurement Study – World Bank • Vulnerability Analysis and Mapping Surveys – World Food Program • FAOSTAT – National food supply data, other info Recommendations Best Practices • To evaluate agricultural programs & policies: assess outcomes proximal to interventions • Continue to foster a diverse set of indicators for population monitoring – – – – Women's Diet Diversity Score on DHS, MICS Food Consumption Score on VAM, LSMS Pilot-test 24-Hr Recall on LSMS Food Balance Sheet indicators Recommendations Research & Development • New proxy validation research should – integrate several indicators – include information on costs • Focus on making 'gold standards' less costly, rather than on making more low-cost proxies • New research is needed on developing indicators of energy expenditure Recommendations Nutritional Diplomacy • Seek inter-agency collaboration in – survey implementation – instrument, indicator development • Use representative expert panels to develop consensus on – specific indicators, overall measurement approach – thresholds to count the affected
