Food and Nutrition Bulletin最新文献

Background: Information on food consumption, dietary diversity, and nutrient inadequacies are key for informing food security and nutrition programming. Household- and individual-level data together provide the most complete information, but individual dietary modules are not always feasible in humanitarian contexts due to cost and time constraints.

Objective: This article asks to what extent it is possible to use food consumption data which is commonly collected at household level through food security and vulnerability surveys, to assess the household's access to vitamin A and iron.

Methods: The validation analysis uses household food consumption and expenditure surveys from Guatemala, Honduras, Nepal, and Uganda and the adult male equivalent approach for calculating nutrient access.

Results: The results show a positive significant correlation between the frequency of consumption and adequacy as estimated from comprehensive household food consumption modules, with correlation in the range of 0.4 to 0.7. Frequency thresholds for distinguishing between adequate and inadequate nutrient access, based on how often foods rich in the relevant nutrient are eaten during 1 week, mostly fulfill standard sensitivity and specificity criteria.

Conclusions: The article concludes that in humanitarian contexts, a frequency-based proxy for nutrient access based on household data commonly collected in emergency assessments and through monitoring systems can be used and can support this particular data gap. As a rule of thumb, a frequency threshold of 7 should be used for vitamin A and of 12 for iron.

Background: South Sudan has experienced ongoing civil and environmental problems since gaining independence in 2011 that may influence childhood nutritional status.

Objective: To estimate the prevalence of undernutrition among children in South Sudan in 2018 and 2019 compared to the prevalence in 2010.

Methods: Data on height and weight were collected using a 2-stage stratified sample framework in which households were randomly selected at the county level and nutritional status was calculated for all children under 5 years of age to determine height-for-age, weight-for-height, and weight-for-age Z-scores (HAZ, WHZ, and WAZ) and the prevalence of stunting, wasting, and underweight. Linear and logistic regression analyses were used to determine factors associated with nutritional status and the odds ratio for nutritional outcomes.

Results: In 2010, the mean HAZ, WHZ, and WAZ was -0.78, -0.82, and -1.15, respectively, and the prevalence of stunting, wasting, and underweight was 30%, 23%, and 32%, respectively. In 2018 and 2019, the mean HAZ, WHZ, and WAZ was -0.50, -0.70, -0.77 and -0.53, -0.77, -0.76, respectively. The prevalence of stunting, wasting, and underweight in 2018 and 2019 was 17%, 14%, 15% and 16%, 16%, 17%, respectively. Age was negatively associated with all nutritional indices and girls had higher HAZ, WHZ, and WAZ and a lower mid upper arm circumference (P < .01) compared to boys. The risk of poor nutritional outcomes was associated with vaccine status and varied by state of residence.

Conclusions: Following independence in 2010, the prevalence of undernutrition in South Sudan decreased, but the risk for undernutrition varied by state and efforts to address food security and health need to ensure equitable access for all children in South Sudan.

Background: Fortification of rice with slaked lime is an acceptable and inexpensive way to combat calcium (Ca) deficiency. However, bioavailability of calcium after intake of slaked lime fortified rice is yet to be investigated.

Objective: To measure the fractional absorption of Ca (FAC) from slaked lime fortified cooked rice.

Design: We conducted an experimental study using stable isotopes of Ca to measure FAC during a single morning test meal containing rice fortified with slaked lime. Participants (n = 22) were given slaked lime fortified rice 3 times a day for 4 days. On the morning of the fifth day, the participants were served the same amount of rice as previous the 4 days at the breakfast test meal with an accurately measured amount of ⁴⁴Ca stable isotope oral tracer followed by an intravenous injection of ⁴²Ca. Urine was collected over the next 24 hours in 3 consecutive 8-hour pools. Fractional absorption of Ca was calculated from the measurement of the relative enrichment of the of each administered tracer ⁴⁴Ca and ⁴²Ca using inductively coupled plasma mass spectrometry.

Results: The mean Ca concentration in the test meal was 879.5 ± 152.9 µg/g with a coefficient of variance (CV) of 17.2%. Although Ca absorption efficiency decreases with higher calcium intake, the total amount of calcium absorbed from test meal using FAC = 0.391 calculated from the third 8-hour urine pool was 69.0 (CV of 15.6) mg.

Conclusions: We showed that one-fifth of daily calcium recommendation for women of reproductive age could be met by ingesting ∼200 g cooked slake fortified rice.

Background: Schools can play an important role in promoting healthy child diet and body weight. However, this issue is understudied in Latin American and other populations undergoing nutrition and epidemiologic transition.

Objectives: 2018 Ecuadorian National Health and Nutrition Survey data were used to examine the association of school food sources with healthy and unhealthy food intake and body mass index (BMI) in primary (n = 12632) and secondary students (n = 6617).

Methods: Data on school food environment characteristics were collected by questionnaire, intakes of fruits, vegetables, plain water, sweetened beverages, processed snacks, and fast foods by food frequency questionnaire, and BMI using measured weight and height. Data were analyzed using multivariable methods.

Results: The major school food sources were competitive foods sold by commercial outlets (73%), School Breakfast Program (SBP; 52%), and home-packed items (37%). Most (69%) competitive food outlets sold fruits and vegetables but only 44% offered free clean drinking water and 60% sold prohibited "red traffic light" foods. Primary and secondary students who bought competitive foods consumed sweetened beverages, processed snacks, and fast food more frequently than nonpurchasers (P = .0001). Those who packed home foods had higher fruit and vegetable intakes (P = .0001). Plain water intakes were reduced among all SBP participants (P = .0001). However, primary students in the SBP consumed fast foods less frequently (P = .0001) and had lower average BMI and odds for being obese compared to nonparticipants (P = .0001).

Conclusion: The findings from this nationally representative study underscore the important contribution of the school food environment to child nutrition.