The appropriate measurement of food security is critical for targeting food and economic aid; supporting early famine warning and global monitoring systems; evaluating nutrition, health, and development programs; and informing government policy across many sectors. This important work is complicated by the multiple approaches and tools for assessing food security. In response, we have prepared a compendium and review of food security assessment tools in which we review issues of terminology, measurement, and validation. We begin by describing the evolving definition of food security and use this discussion to frame a review of the current landscape of measurement tools available for assessing food security. We critically assess the purpose/s of these tools, the domains of food security assessed by each, the conceptualizations of food security that underpin each metric, as well as the approaches that have been used to validate these metrics. Specifically, we describe measurement tools that 1) provide national-level estimates of food security, 2) inform global monitoring and early warning systems, 3) assess household food access and acquisition, and 4) measure food consumption and utilization. After describing a number of outstanding measurement challenges that might be addressed in future research, we conclude by offering suggestions to guide the selection of appropriate food security metrics.

SummaryBackgroundChild stunting reduces survival and impairs neurodevelopment. We tested the independent and combined effects of improved water, sanitation, and hygiene (WASH), and improved infant and young child feeding (IYCF) on stunting and anaemia in in Zimbabwe.MethodsWe did a cluster-randomised, community-based, 2 × 2 factorial trial in two rural districts in Zimbabwe. Clusters were defined as the catchment area of between one and four village health workers employed by the Zimbabwe Ministry of Health and Child Care. Women were eligible for inclusion if they permanently lived in clusters and were confirmed pregnant. Clusters were randomly assigned (1:1:1:1) to standard of care (52 clusters), IYCF (20 g of a small-quantity lipid-based nutrient supplement per day from age 6 to 18 months plus complementary feeding counselling; 53 clusters), WASH (construction of a ventilated improved pit latrine, provision of two handwashing stations, liquid soap, chlorine, and play space plus hygiene counselling; 53 clusters), or IYCF plus WASH (53 clusters). A constrained randomisation technique was used to achieve balance across the groups for 14 variables related to geography, demography, water access, and community-level sanitation coverage. Masking of participants and fieldworkers was not possible. The primary outcomes were infant length-for-age Z score and haemoglobin concentrations at 18 months of age among children born to mothers who were HIV negative during pregnancy. These outcomes were analysed in the intention-to-treat population. We estimated the effects of the interventions by comparing the two IYCF groups with the two non-IYCF groups and the two WASH groups with the two non-WASH groups, except for outcomes that had an important statistical interaction between the interventions. This trial is registered with ClinicalTrials.gov, number NCT01824940.FindingsBetween Nov 22, 2012, and March 27, 2015, 5280 pregnant women were enrolled from 211 clusters. 3686 children born to HIV-negative mothers were assessed at age 18 months (884 in the standard of care group from 52 clusters, 893 in the IYCF group from 53 clusters, 918 in the WASH group from 53 clusters, and 991 in the IYCF plus WASH group from 51 clusters). In the IYCF intervention groups, the mean length-for-age Z score was 0·16 (95% CI 0·08–0·23) higher and the mean haemoglobin concentration was 2·03 g/L (1·28–2·79) higher than those in the non-IYCF intervention groups. The IYCF intervention reduced the number of stunted children from 620 (35%) of 1792 to 514 (27%) of 1879, and the number of children with anaemia from 245 (13·9%) of 1759 to 193 (10·5%) of 1845. The WASH intervention had no effect on either primary outcome. Neither intervention reduced the prevalence of diarrhoea at 12 or 18 months. No trial-related serious adverse events, and only three trial-related adverse events, were reported.InterpretationHousehold-level elementary WASH interventions implemented in rural areas in low-income countries are unlikely to reduce stunting or anaemia and might not r...

There is scarce research and programmatic evidence on the effect of poor water, sanitation, and hygiene (WASH) conditions of the physical environment on early child cognitive, sensorimotor, and socioemotional development. Furthermore, many common WASH interventions are not specifically designed to protect babies in the first 3 years of life, when gut health and linear growth are established. We review evidence linking WASH, anemia, and child growth, and highlight pathways through which WASH may affect early child development, primarily through inflammation, stunting, and anemia. Environmental enteropathy, a prevalent subclinical condition of the gut, may be a key mediating pathway linking poor hygiene to developmental deficits. Current early child development research and programs lack evidence-based interventions to provide a clean play and infant feeding environment in addition to established priorities of nutrition, stimulation, and child protection. Solutions to this problem will require appropriate behavior change and technologies that are adapted to the social and physical context and conducive to infant play and socialization. We propose the concept of baby WASH as an additional component of early childhood development programs.

To assess the impact on child growth of the nutrition-counseling component of the Integrated Management of Childhood Illnesses (IMCI) strategy, a randomized trial was implemented. All 28 government health centers in a Southern Brazil city were paired according to baseline nutritional indicators. One center from each pair was randomly selected and its doctors received 20-h training in nutrition counseling. Thirty-three doctors were included and 12-13 patients < 18 mo of age from each doctor were recruited. The study included testing the knowledge of doctors, observing consultations and visiting the children at home 8, 45 and 180 d after the initial consultation. Maternal knowledge, practices and adherence to nutritional recommendations were assessed, and anthropometric measurements were taken. Day-long dietary intake was evaluated on a subsample of children. Doctors in the intervention group had better knowledge of child nutrition and improved assessment and counseling practices. Maternal recall of recommendations was higher in the intervention than in the control group, as was satisfaction with the consultation. Reported use of recommended foods was also increased. Daily fat intake was higher in the intervention than in the control group; mean daily intakes of energy and zinc also tended to improve. Children 12 mo of age or older had improved weight gain and a positive but nonsignificant improvement in length. Nutrition-counseling training improved doctors' performances, maternal practices and the diets and weight gain of children. The randomized design with blind outcome evaluation strongly supports a causal link. These results should be replicated in other settings.

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Physician behavior and caregiver retention of nutrition advice were examined as potential mediating factors in the success of a nutrition counseling efficacy trial in Pelotas, Brazil, which reduced growth faltering in children 12-24 mo old. After pair-matching on socioeconomic status and nutrition indicators, municipal health centers were randomly assigned to an intervention group, in which physicians were trained with an IMCI-derived (Integrated Management of Childhood Illness) nutrition counseling protocol, or to a control group, without continuing education in nutrition. In a substudy of the larger trial, direct observation of consultations, followed by home interviews with mothers, provided data on physician counseling behavior and mothers' retention of nutrition advice. Trained providers were more likely to engage in nutrition counseling (P < 0.013) and to deliver more extensive advice (P < 0.02). They also used communication skills designed to improve rapport and ensure that mothers understood the advice (P < 0.01). Mothers who received advice from trained providers had high rates of recalling the messages on specific foods (95 vs.27%; P < 0.01) and feeding practice and food preparation recommendations (90 vs. 20%; P < 0.01), whereas the proportions of the messages recalled on breast-feeding (60% vs. 30%) did not differ significantly (P < 0.20). The training course contained several elements that may explain why intervention group mothers were better able to recall nutrition advice. These include locally appropriate messages, tools for assessing individual problems, and counseling skills.

We evaluated the effectiveness of a 2-mo treatment of Sprinkles containing 12.5 mg iron, 5 mg zinc, 400 microg vitamin A, 160 microg folic acid, and 30 mg vitamin C in reducing anemia among children 9- to 24 mo old in Haiti. Ten food distribution points (FDP) where children received take-home rations of fortified wheat-soy blend (WSB) were randomly allocated into 2 groups: 1) Sprinkles-WSB (S-WSB) (6 FDP; n = 254), receiving 30 sachets of Sprinkles monthly for 2 mo; and 2) WSB only (WSB) (4 FDP; n = 161), not receiving Sprinkles. At baseline, anemia prevalence [hemoglobin (Hb) < 100 g/L], adjusted for age and sex, was 54 and 39% in S-WSB and WSB groups, respectively. After the 2-mo intervention (1st follow-up), anemia, adjusted for baseline prevalence, age, and sex dropped to 24% in S-WSB (P < 0.001) and increased to 43% in WSB (P = 0.07). At 7 mo postintervention, anemia in S-WSB declined to 14%; 92% of children who were nonanemic at 1st follow-up remained so without further Sprinkles consumption. From baseline to 1st follow-up, mean Hb increased by 5.5 g/L and dropped by 1.0 g/L in the S-WSB and WSB groups, respectively (P < 0.001). From baseline to 2nd follow-up, mean Hb increased by 10.9 g/L in S-WSB (P < 0.001). Changes in mean Hb were greater for younger children (<21 mo at onset of intervention) (P < 0.05) and for children who were anemic at baseline (P< 0.001). In populations with a high prevalence of anemia, such as rural Haiti, 2 mo of Sprinkles are effective in reducing anemia among 9- to 24-mo-old children.

The importance of cultural and behavioural factors in children's nutrition, particularly with regard to feeding, has been recognized only recently. The combination of evidence regarding the importance of caregiving behaviour for good nutrition, and improved strategies for measuring behaviour have led to a renewed interest in care. The UNICEF conceptual framework suggests that care, in addition to food security and health care services, are critical for children's survival, growth and development. The present paper focuses on the care practice of complementary feeding, specifically behavioural factors such as parental interaction patterns, feeding style and adaptation of feeding to the child's motor abilities (self-feeding or feeding by others). Three kinds of feeding styles (Birch & Fisher, 1995) are identified: controlling; laissez-faire; responsive. Probable effects of each feeding style on nutrient intake are described. A number of studies of feeding behaviour have suggested that the laissez-faire style is most frequently observed among families and communities with a higher prevalence of malnourished children. Nutrition interventions that have been able to show significant effects on outcomes, such as the Hearth Model in Vietnam (Sternin et al. 1997), have usually incorporated behavioural components in their intervention. At this time, there have been no tests of the efficacy of behavioural interventions to improve feeding practices. Research is needed to understand behavioural factors in complementary feeding, and to identify and test intervention strategies designed to improve nutrient intake of young children. Finally, the paper concludes with a discussion of how nutrition programmes might change if care were incorporated. Care and child nutrition: Complementary feeding: Child development: MalnutritionIt is well known that inadequate food intake in the first 2 years of life is responsible for stunting and underweight in millions of children around the world (United Nations Children's Fund, 1998). Poor breast-feeding patterns, low nutrient density and poor quality of the foods that complement breast-feeding accounts for much of the nutrient deficiency (Brown et al. 1998). These patterns of feeding are not simply the result of low food availability in the household. In the present paper we suggest that caregivers' behaviours during feeding of complementary foods (those foods ingested by the child while the child is still being breast-fed, theoretically between the ages of 6 months and 2 years. Even though many children are not still breast-fed at this time, the term continues to be useful to describe this transitional period of food consumption (Brown et al. 1998)) contribute significantly to the adequacy of children's nutrient intake, and therefore to their nutritional status. The present paper will discuss four issues: (1) why there is an interest in feeding practices and care for nutrition; (2) the definition of care and its conceptual framework; (3) examples of research that illustrate the importance o...