Jef L Leroy
Biographic Data
| ID | 1245510 |
|---|---|
| NAME | Jef L Leroy |
| GIVEN NAMES | Jef L |
| FAMILY NAME | Leroy |
| SIGNATURE | LEROY J L |
| AFFILIATIONS | International Food Policy Research Institute |
| ORCID | 0000-0001-9371-3832 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 33 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2007 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
Haemoglobin concentration thresholds that discriminate functional outcomes among children aged 6–30 months in eight countries
Introduction The WHO cut-offs to define anaemia among children (haemoglobin, Hb <105 g/L in 6–23 months and <110 g/L in 24–59 months) are based on the distribution of Hb concentrations in a healthy population. Our objective was to identify Hb values that best discriminate functional outcomes among children aged 6–30 months. Methods We used previously compiled datasets from an individual participant data meta-analysis of effects of small quantity …
Enhancing agency and empowerment in agricultural development projects
Development interventions increasingly include women's empowerment and gender equality among their objectives, but evaluating their impact has been stymied by the lack of measures that are comparable across interventions. This paper synthesizes the findings of 11 mixed-methods impact evaluations of agricultural development projects from South Asia and sub-Saharan Africa that were part of the Gender, Agriculture, and Assets Project, Phase 2 (GAAP2…
Strengthening causal inference from randomised controlled trials of complex interventions
Researchers conducting randomised controlled trials (RCTs) of complex interventions face design and analytical challenges that are not fully addressed in existing guidelines. Further guidance is needed to help ensure that these trials of complex interventions are conducted to the highest scientific standards while maximising the evidence that can be extracted from each trial. The key challenge is how to manage the multiplicity of outcomes require…
Preventive small-quantity lipid-based nutrient supplements reduce severe wasting and severe stunting among young children
Including SQ-LNSs in preventive interventions to promote healthy child growth and development is likely to reduce rates of severe wasting and stunting. This meta-analysis was registered at www.crd.york.ac.uk/PROSPERO as CRD42019146592.
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child growth
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child anemia and micronutrient status
Perspective
The past decade has seen an unprecedented increase in attention to undernutrition, and drastically reducing child stunting has become a global development objective. The strong focus on linear growth retardation and stunting has enabled successful advocacy for nutrition, but with this focus has come some confusion and misunderstanding about the meaning of linear growth retardation and stunting among researchers, donors, and agencies active in nut…
The cost of improving nutritional outcomes through food‐assisted maternal and child health and nutrition programmes in Burundi and Guatemala
Evidence on the cost-effectiveness of multisectoral maternal and child health and nutrition programmes is scarce. We conducted a prospective costing study of two food-assisted maternal and child health and nutrition programmes targeted to pregnant women and children during the first 1,000 days (pregnancy to 2 years). Each was paired with a cluster-randomized controlled trial to evaluate impact and compare the optimal quantity and composition of f…
Randomized controlled trials of multi-sectoral programs
Development is a multi-faceted process; achieving development goals thus requires a multi-sectoral approach. For over two decades, our research group of economists and nutritionists has designed and implemented randomized trials to assess the effectiveness of multisectoral programs in improving nutrition, food security, and other measures of well-being, largely at the request of developing country governments, development partners, and non-govern…
Low level aflatoxin exposure associated with greater linear growth in southern Mexico
Aflatoxins are a group of naturally occurring mycotoxins, which can lead to death and are a known cause of hepatocellular carcinoma. AF exposure has been hypothesised to lead to stunted growth in children, but separating the AF effect from other determinants of linear growth retardation is difficult. The study used secondary data from an efficacy trial conducted in young children in southern Mexico to test the comparative efficacy of a milk-based…
The impact of integrated prevention and treatment on child malnutrition and health
Clinicaltrials.gov NCT02323815 (registered on December 18, 2014) and NCT02245152 (registered on September 16, 2014)
Measuring the Food Access Dimension of Food Security
BACKGROUND: With food security now a top priority for many governments and for the global development community, there is heightened awareness of the need to improve our understanding and measurement of food security. OBJECTIVE: To bring clarity in the assessment of the food access dimension of food security at the household and individual level. METHODS: For the most commonly used indicators, we reviewed their original purpose and construction, …
Serum aflatoxin B 1 -lysine adduct level in adult women from Eastern Province in Kenya depends on household socio-economic status
The impact of conditional cash transfer programmes on child nutrition
The authors reviewed the evidence regarding the impact of conditional cash transfer (CCT) programmes on child nutrition outcomes, using a programme theory framework. They developed a programme impact model and synthesised evidence regarding the pathways through which CCTs may improve child nutrition. CCT programmes significantly improve child anthropometry but have very little impact on micronutrient status. The programmes also have a positive im…
Leroy Et Al. Respond
We read Woolf and Johnson’s letter with great interest. The similarity of the findings for developing countries and the United States is impressive,1 as they reflect the influence of the shared assumptions in the research community that lead to low investments in research to improve the fidelity (quality) of health care delivery and utilization. We have a slight correction to make to their letter. Our research shows that 6 million (not 4 million)…
Current Priorities in Health Research Funding and Lack of Impact on the Number of Child Deaths per Year
We determined the proportion of research on childhood mortality directed toward better medical technology (i.e., by improving old technology or creating new technology) compared with research on technology delivery and utilization. We also estimated mortality reductions from a research-funding strategy focusing primarily on developing technology compared with one that also focused on delivery and utilization. Ninety-seven percent of grants were f…
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child growth
Current Priorities in Health Research Funding and Lack of Impact on the Number of Child Deaths per Year
We determined the proportion of research on childhood mortality directed toward better medical technology (i.e., by improving old technology or creating new technology) compared with research on technology delivery and utilization. We also estimated mortality reductions from a research-funding strategy focusing primarily on developing technology compared with one that also focused on delivery and utilization. Ninety-seven percent of grants were f…
Preventive small-quantity lipid-based nutrient supplements reduce severe wasting and severe stunting among young children
Including SQ-LNSs in preventive interventions to promote healthy child growth and development is likely to reduce rates of severe wasting and stunting. This meta-analysis was registered at www.crd.york.ac.uk/PROSPERO as CRD42019146592.
Enhancing agency and empowerment in agricultural development projects
Development interventions increasingly include women's empowerment and gender equality among their objectives, but evaluating their impact has been stymied by the lack of measures that are comparable across interventions. This paper synthesizes the findings of 11 mixed-methods impact evaluations of agricultural development projects from South Asia and sub-Saharan Africa that were part of the Gender, Agriculture, and Assets Project, Phase 2 (GAAP2…
Randomized controlled trials of multi-sectoral programs
Development is a multi-faceted process; achieving development goals thus requires a multi-sectoral approach. For over two decades, our research group of economists and nutritionists has designed and implemented randomized trials to assess the effectiveness of multisectoral programs in improving nutrition, food security, and other measures of well-being, largely at the request of developing country governments, development partners, and non-govern…
Leroy Et Al. Respond
We read Woolf and Johnson’s letter with great interest. The similarity of the findings for developing countries and the United States is impressive,1 as they reflect the influence of the shared assumptions in the research community that lead to low investments in research to improve the fidelity (quality) of health care delivery and utilization. We have a slight correction to make to their letter. Our research shows that 6 million (not 4 million)…
Current Priorities in Health Research Funding and Lack of Impact on the Number of Child Deaths per Year
We determined the proportion of research on childhood mortality directed toward better medical technology (i.e., by improving old technology or creating new technology) compared with research on technology delivery and utilization. We also estimated mortality reductions from a research-funding strategy focusing primarily on developing technology compared with one that also focused on delivery and utilization. Ninety-seven percent of grants were f…
The impact of conditional cash transfer programmes on child nutrition
The authors reviewed the evidence regarding the impact of conditional cash transfer (CCT) programmes on child nutrition outcomes, using a programme theory framework. They developed a programme impact model and synthesised evidence regarding the pathways through which CCTs may improve child nutrition. CCT programmes significantly improve child anthropometry but have very little impact on micronutrient status. The programmes also have a positive im…
Measuring the Food Access Dimension of Food Security
BACKGROUND: With food security now a top priority for many governments and for the global development community, there is heightened awareness of the need to improve our understanding and measurement of food security. OBJECTIVE: To bring clarity in the assessment of the food access dimension of food security at the household and individual level. METHODS: For the most commonly used indicators, we reviewed their original purpose and construction, …
Serum aflatoxin B 1 -lysine adduct level in adult women from Eastern Province in Kenya depends on household socio-economic status
The impact of integrated prevention and treatment on child malnutrition and health
Clinicaltrials.gov NCT02323815 (registered on December 18, 2014) and NCT02245152 (registered on September 16, 2014)
Low level aflatoxin exposure associated with greater linear growth in southern Mexico
Aflatoxins are a group of naturally occurring mycotoxins, which can lead to death and are a known cause of hepatocellular carcinoma. AF exposure has been hypothesised to lead to stunted growth in children, but separating the AF effect from other determinants of linear growth retardation is difficult. The study used secondary data from an efficacy trial conducted in young children in southern Mexico to test the comparative efficacy of a milk-based…
Perspective
The past decade has seen an unprecedented increase in attention to undernutrition, and drastically reducing child stunting has become a global development objective. The strong focus on linear growth retardation and stunting has enabled successful advocacy for nutrition, but with this focus has come some confusion and misunderstanding about the meaning of linear growth retardation and stunting among researchers, donors, and agencies active in nut…
The cost of improving nutritional outcomes through food‐assisted maternal and child health and nutrition programmes in Burundi and Guatemala
Evidence on the cost-effectiveness of multisectoral maternal and child health and nutrition programmes is scarce. We conducted a prospective costing study of two food-assisted maternal and child health and nutrition programmes targeted to pregnant women and children during the first 1,000 days (pregnancy to 2 years). Each was paired with a cluster-randomized controlled trial to evaluate impact and compare the optimal quantity and composition of f…
Randomized controlled trials of multi-sectoral programs
Development is a multi-faceted process; achieving development goals thus requires a multi-sectoral approach. For over two decades, our research group of economists and nutritionists has designed and implemented randomized trials to assess the effectiveness of multisectoral programs in improving nutrition, food security, and other measures of well-being, largely at the request of developing country governments, development partners, and non-govern…
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child growth
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child anemia and micronutrient status
Strengthening causal inference from randomised controlled trials of complex interventions
Researchers conducting randomised controlled trials (RCTs) of complex interventions face design and analytical challenges that are not fully addressed in existing guidelines. Further guidance is needed to help ensure that these trials of complex interventions are conducted to the highest scientific standards while maximising the evidence that can be extracted from each trial. The key challenge is how to manage the multiplicity of outcomes require…
Preventive small-quantity lipid-based nutrient supplements reduce severe wasting and severe stunting among young children
Including SQ-LNSs in preventive interventions to promote healthy child growth and development is likely to reduce rates of severe wasting and stunting. This meta-analysis was registered at www.crd.york.ac.uk/PROSPERO as CRD42019146592.
Enhancing agency and empowerment in agricultural development projects
Development interventions increasingly include women's empowerment and gender equality among their objectives, but evaluating their impact has been stymied by the lack of measures that are comparable across interventions. This paper synthesizes the findings of 11 mixed-methods impact evaluations of agricultural development projects from South Asia and sub-Saharan Africa that were part of the Gender, Agriculture, and Assets Project, Phase 2 (GAAP2…
Haemoglobin concentration thresholds that discriminate functional outcomes among children aged 6–30 months in eight countries
Introduction The WHO cut-offs to define anaemia among children (haemoglobin, Hb <105 g/L in 6–23 months and <110 g/L in 24–59 months) are based on the distribution of Hb concentrations in a healthy population. Our objective was to identify Hb values that best discriminate functional outcomes among children aged 6–30 months. Methods We used previously compiled datasets from an individual participant data meta-analysis of effects of small quantity …
Medicine (12 works) · Environmental health (7 works) · Child Nutrition and Water Access (6 works) · Economics (6 works) · Computer Science (5 works) · Economic growth (5 works) · Poverty, Education, and Child Welfare (5 works) · Business (4 works) · Psychology (4 works) · Agriculture (3 works)