This Campbell systematic review examines whether food supplementation is effective in improving the health of disadvantaged children under 5. The review summarizes findings from 32 studies: 21 randomised controlled trials (RCTs), and 11 controlled beforeâandâafter studies (CBAs).
Supplementary feeding for young, disadvantaged children has small effects on children's weight and growth in lowâ and middleâincome countries. Children who are younger, and poorer or more undernourished grow more in response to supplementary feeding.
More leakage occurs from take home rations. Therefore, food supplementation programs implemented through day care centres seem to be more effective, as are those with stricter supervision.
Both single and multiple interventions were effective for weight gain in children but the effect size for multiple interventions was higher. The effect is also higher for higher energy meals.
There is a positive effect on psychomotor development, which is development of skills that require both mental and muscular activity (such as crawling, walking, talking). However, there was no clear evidence of an effect on cognitive development.
Abstract
BACKGROUNDUndernutrition contributes to five million deaths of children under five each year. Furthermore, throughout the life cycle, undernutrition contributes to increased risk of infection, poor cognitive functioning, chronic disease, and mortality. It is thus important for decisionâmakers to have evidence about the effectiveness of nutrition interventions for young children.
OBJECTIVESPrimary objective
1. To assess the effectiveness of supplementary feeding interventions, alone or with coâintervention, for improving the physical and psychosocial health of disadvantaged children aged three months to five years.
Secondary objectives
1. To assess the potential of such programmes to reduce socioâeconomic inequalities in undernutrition.
2. To evaluate implementation and to understand how this may impact on outcomes.
3. To determine whether there are any adverse effects of supplementary feeding.
SEARCH METHODSWe searched CENTRAL, Ovid MEDLINE, PsycINFO, and seven other databases for all available years up to January 2014. We also searched http://ClinicalTrials.gov and several sources of grey literature. In addition, we searched the reference lists of relevant articles and reviews, and asked experts in the area about ongoing and unpublished trials.
SELECTION CRITERIARandomised controlled trials (RCTs), clusterâRCTs, controlled clinical trials (CCTs), controlled beforeâandâafter studies (CBAs), and interrupted time series (ITS) that provided supplementary food (with or without coâintervention) to children aged three months to five years, from all countries. Adjunctive treatments, such as nutrition education, were allowed. Controls had to be untreated.
DATA COLLECTION AND ANALYSISTwo or more review authors independently reviewed searches, selected studies for inclusion or exclusion, extracted data, and assessed risk of bias. We conducted metaâanalyses*** for continuous d...