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A meta-analysis of community-based studies on quality protein maize

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  • Gunaratna, Nilupa S.
  • Groote, Hugo De
  • Nestel, Penelope
  • Pixley, Kevin V.
  • McCabe, George P.

Abstract

Biofortification, or the improvement of nutritional quality in food crops, is a promising strategy to combat undernutrition, particularly among the rural poor in developing countries. However, traditional methods of impact assessment are inadequate for biofortified crops, as they do not consider their nutritional benefits. Evidence for the nutritional impact of maize varieties with improved protein quality, collectively known as quality protein maize (QPM), was evaluated using meta-analysis of randomized, controlled studies in target communities. A new and generalizable effect size was proposed to quantify the impact of QPM on a key outcome, child growth. The results indicated that consumption of QPM instead of conventional maize leads to a 12% (95% CI: 7-18%) increase in the rate of growth in weight and a 9% (95% CI: 6-15%) increase in the rate of growth in height in infants and young children with mild to moderate undernutrition from populations in which maize is the major staple food. The proposed effect size and use of bootstrapping to determine statistical significance addressed some methodological limitations in the existing studies.

Suggested Citation

  • Gunaratna, Nilupa S. & Groote, Hugo De & Nestel, Penelope & Pixley, Kevin V. & McCabe, George P., 2010. "A meta-analysis of community-based studies on quality protein maize," Food Policy, Elsevier, vol. 35(3), pages 202-210, June.
    • Handle: RePEc:eee:jfpoli:v:35:y:2010:i:3:p:202-210
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    1. Hugo De Groote & Nilupa S. Gunaratna & Monica Fisher & E. G. Kebebe & Frank Mmbando & Dennis Friesen, 2016. "The effectiveness of extension strategies for increasing the adoption of biofortified crops: the case of quality protein maize in East Africa," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 8(6), pages 1101-1121, December.
    2. Diro, Samuel & De Groote, Hugo & Gunarata, Nilupa, 2016. "Effect of nutritional information and sensory quality on the willingness to pay for quality protein maize - results of a field experiment in Jimma zone, Ethiopia," 2016 Fifth International Conference, September 23-26, 2016, Addis Ababa, Ethiopia 246979, African Association of Agricultural Economists (AAAE).
    3. A. V. Vijaya Bhaskar & D. J. Nithya & S. Raju & R. V. Bhavani, 2017. "Establishing integrated agriculture-nutrition programmes to diversify household food and diets in rural India," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 9(5), pages 981-999, October.
    4. De Groote, Hugo & Gunaratna, Nilupa S. & Ergano, Kebebe & Friesen, Dennis, 2010. "Extension and adoption of biofortified crops: Quality protein maize in East Africa," 2010 AAAE Third Conference/AEASA 48th Conference, September 19-23, 2010, Cape Town, South Africa 96429, African Association of Agricultural Economists (AAAE).
    5. Lewis Machida & John Derera & Pangirayi Tongoona & Augustine Langyintuo & John MacRobert, 2014. "Exploration of Farmers’ Preferences and Perceptions of Maize Varieties: Implications on Development and Adoption of Quality Protein Maize (QPM) Varieties in Zimbabwe," Journal of Sustainable Development, Canadian Center of Science and Education, vol. 7(2), pages 194-194, February.
    6. Jaah, Mkupete & Fintel, Dieter von & Burger, Ronelle, 2021. "Maize Price Shock, Agriculture Production and Children Nutrition Outcomes in Tanzania," 2021 Conference, August 17-31, 2021, Virtual 314974, International Association of Agricultural Economists.
    7. Renkow, Mitch & Byerlee, Derek, 2010. "The impacts of CGIAR research: A review of recent evidence," Food Policy, Elsevier, vol. 35(5), pages 391-402, October.

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