Early malnutrition and/or micronutrient deficiencies can adversely affect physical, mental, and social aspects of child health. School feeding programs are designed to improve attendance, achievement, growth, and other health outcomes.
As stated bythe authors: '(1) To determine the effectiveness of school feeding programs in improving physical and psychosocial health outcomes for low income school children; (2) To compare the effectiveness of school feeding programmes for socio-economically disadvantaged children and advantaged children; (3) To understand the process by which school feeding programs achieve (or fail to achieve) an impact on growth, cognitive development, and school performance'
The review has clear inclusion criteria and comprehensive search. However, some of the information for assessing the risk of bias is missing even though the text states that it is provided; and the method of weighting studies in the meta-analysis is not explicitly stated.