Browsing by Author "Stuetz, Wolfgang"

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    Editorial: achieving nutrition security in Tanzania by improving production, education and economics: methods, tools and applications
    (Frontiers, 2022-09-20) Hoffmann, Harry Konrad; Kinabo, Joyce Ludovick; Sieber, Stefan; Stuetz, Wolfgang; Bonatti, Michelle; Mbwana, Hadijah Ally; Uckert, Götz Bernhard; Matavel, Custodio Efraim; Hafner, Johannes Michael; Löhr, Katharina; Rybak, Constance
    Globally, the number of people unable to afford a healthy diet rose by 112 million to almost 3.1 billion, reflecting the impacts of rising consumer food prices during the pandemic (1). In this context, food security and nutrition is increasingly highlighted as a priority among both scientists (2) and political decision makers (3). On the African continent, this topic is of particular importance as the number of individuals affected by undernourishment remained on a high level throughout the 2010s, and since 2019 are again rising (Figure 1)– the war in Ukraine will most likely cause even greater problems (4). In 2021, hunger affected 278 million people in Africa. Situated in one of the globally most affected regions, achieving food security and nutrition is already a substantial challenge in Tanzania, with the Food and Agriculture Organization (FAO) (5) reporting that, between 2014 and 2020, the overall prevalence of moderate or severe food insecurity in the total population has affected roughly 55-56% of the overall population. However, these already severe numbers do not display the food security situation in 2022 adequately because the devastating effects of the Covid-19 pandemic (6) and the subsequent spikes in global food prices since the 24th of February 2022 are not included. The latter is especially worrying as more than 65% of imported wheat in Tanzania derives from Russia (ca. 50%) or Ukraine (ca. 15%) (7). Furthermore, prices for agricultural inputs, like fertilizers and pesticides, are also increasing significantly, given that these are mainly imported from Russia. The knock-on effects will likewise worsen the food security situation in the near future. Thus, the topic of this special issue is even more important than it was when it was launched, especially as Tanzania is likely to be among the 10 largest countries globally in 2100 (8) and, simultaneously, climate change will hit East Africa (9) including Tanzania (10) particularly hard. The included set of papers aim to address the overall challenge of food insecurity from different disciplinary angles and on different analytical levels, thus holistically displaying the magnitude of the problem and showcasing potential pathways for solving some aspects of the crisis.
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    Potentials and limitations of a food group-based algorithm to assess dietary nutrient intake of women in rural areas in Tanzania
    (International Journal of Food Sciences and Nutrition, 2024-03) Eleraky, Laila; Stuetz, Wolfgang; Rybak, Constance; Frank, Jan; Biesalski, Hans Konrad; Mbwana, Hadijah; Kinabo, Joyce; Lambert, Christine
    The aim of this study was to evaluate the accuracy of nutrient intake assessment with the food group-based algorithm “Calculator of Inadequate Micronutrient Intake” (CIMI) in comparison to the established nutrition software NutriSurvey. Using Food Frequency questionnaires and 24-h dietary recalls of 1010 women from two rural districts in Tanzania, 23 relevant typical Tanzanian food groups were identified and subsequently the dietary protocols assessed via CIMI algorithm were compared by bivariate correlations and Bland-Altman analysis with the results of the NutriSurvey software (reference) and were set in relation to blood biomarkers of 666 participants. CIMI and NutriSurvey calculations regarding macro- and micronutrient intakes were similar. The Bland-Altman analyses and correlation coefficients of energy (0.931), protein (0.898), iron (0.775) and zinc (0.838) confirm the agreement of both calculations. The food group based CIMI algorithm is a practical tool to identify the inadequacy of macro- and micronutrient intake at population level.