Nutritional status as a determinant of cognitive development among preschool children in South-Western Nigeria

Improving the health of children under the age of five is one of the main objectives of primary healthcare services in most developing countries. The purpose of this paper is to identify the nutritional status of children under the age of five and its impact on cognitive function.

The cross-sectional study was carried out in a semi-urban community in south-western Nigeria. The sample consisted of 220 school children under the age of five. Anthropometric measurements including weight, height and mid arm circumference were carried out to determine the nutritional status of the children. Cognitive function of the children was assessed using a developmental checklist developed by the American Academy of Pediatrics and their performance was graded as good, fair and poor.

The overall prevalence of malnutrition in this study was low with stunting, underweight and wasting recording 8.2, 6.8 and 1.8 percent, respectively thereby making stunting the most common malnutrition indicator in this study. A large proportion of the children (88.6 percent) had good cognitive performance while 11.4 and 5.5 percent had fair and poor cognitive performance, respectively. Among the various malnutrition indicators measured in this study, stunting was found to have a statistically significant association with cognitive development (p=0.005).Stunted children have multiple functional disadvantages that persist throughout childhood and poor nutrition almost certainly plays a role. This paper calls for a need for the Nigerian Government to intervene by ensuring that policies are implemented that will ensure that health and nutritional needs of preschool children are guaranteed right from conception.

In view of the importance of nutrition for cognition in children, this research has shown that the cognitive function of preschool children can be affected by stunting and it has contributed to global data on nutrition and cognition particularly in South-Western Nigeria.